The principles of arithmetic. [Followed by] The principles of algebra |
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Page 111
... square , x2 + 12x + 36 = 36 + 108 ( 2 ) and extracting the roots , x + 6 = ± 12 .. x = +12 66 or 18 . x2 - x + 3 = 45 - By transposition , x2 x = 42 --- completing the square , x - x + ( 3 ) and extracting the roots , 2 : 13 2 1 1 .. x ...
... square , x2 + 12x + 36 = 36 + 108 ( 2 ) and extracting the roots , x + 6 = ± 12 .. x = +12 66 or 18 . x2 - x + 3 = 45 - By transposition , x2 x = 42 --- completing the square , x - x + ( 3 ) and extracting the roots , 2 : 13 2 1 1 .. x ...
Page 112
Wales Christopher Hotson. 9 + 25 18 it 5 215 21 completing the square , x2 + ( 5 ) 6х + 0160 ] and extracting the roots , x + .. x = - 10 3 18 ± 5 - 14 5 --- x2 2 = = 3 or - 2x · = 21 Multiplying by 9x2 , 90x 126 + 18x 63 815 = 324 25 ...
Wales Christopher Hotson. 9 + 25 18 it 5 215 21 completing the square , x2 + ( 5 ) 6х + 0160 ] and extracting the roots , x + .. x = - 10 3 18 ± 5 - 14 5 --- x2 2 = = 3 or - 2x · = 21 Multiplying by 9x2 , 90x 126 + 18x 63 815 = 324 25 ...
Page 117
... completing the square , - 46x2 + 99+ 27 = 36 and taking the roots , .. x2 = 3 ± 6 2-3 ± 6 == = 9 , or 3 - which are the two values of x2 : hence , by evolution , x = ± 3 , or ± √ . 3 . whence the four roots of the equation , or values ...
... completing the square , - 46x2 + 99+ 27 = 36 and taking the roots , .. x2 = 3 ± 6 2-3 ± 6 == = 9 , or 3 - which are the two values of x2 : hence , by evolution , x = ± 3 , or ± √ . 3 . whence the four roots of the equation , or values ...
Page 118
... Completing the square , x + 4x2 + 4 = 12 + 4 = 16 and extracting the roots , 24+ 2 = ± 4 .. x4 = - 2 +4 2 , or = 6 -- whence x2 = ± √2 , or ± √ - 6 and .. = √ ( ± √2 ) , or ± √ ( ± √ − 6 ) ; x = which are the eight roots . ( 4 ) ...
... Completing the square , x + 4x2 + 4 = 12 + 4 = 16 and extracting the roots , 24+ 2 = ± 4 .. x4 = - 2 +4 2 , or = 6 -- whence x2 = ± √2 , or ± √ - 6 and .. = √ ( ± √2 ) , or ± √ ( ± √ − 6 ) ; x = which are the eight roots . ( 4 ) ...
Page 119
... completing the square , we shall have 6y + 9 = 25 y2 - 3 and .. or x y = 3 +5 - 8 , or - 2 whence x = 4 × or 4 4 ; of which the three values of 43 are introduced by involution , being the roots of the equation x3 + 6x2 + 16 . ( 7 ) 3xn ...
... completing the square , we shall have 6y + 9 = 25 y2 - 3 and .. or x y = 3 +5 - 8 , or - 2 whence x = 4 × or 4 4 ; of which the three values of 43 are introduced by involution , being the roots of the equation x3 + 6x2 + 16 . ( 7 ) 3xn ...
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The Principles of Arithmetic. [Followed By] the Principles of Algebra Wales Christopher Hotson No preview available - 2016 |
Common terms and phrases
algebraical ar˛ Arithmetic arithmetical progression ax˛ called cent ciphers coefficient common denominator completing the square compound contain decimal places difference digits Divide dividend divisible divisor equal equivalent vulgar fraction EXAMPLES FOR PRACTICE expression Extract the square feet figures Find the greatest find the least Find the value geometrical progression given number given sum greatest common factor greatest common measure Hence highest common factor integer least common multiple logarithms lowest terms mixed numbers Multiply number of permutations number of terms number of variations obtained pound proportion quadratic equation quan quotient ratio Reduce remainder required number Required the sum solid content square root subtraction surds taken Transform unknown quantities whence whole number ах
Popular passages
Page 157 - ... 8 days. But on the evening of the sixth day, 100 men were killed in a sally, and afterwards the mortality increased to 10 daily. Supposing the stock of provisions unconsumed at the end of the sixth day to support 6 men for 61 days ; it is required to find how long it would support the garrison, and the number of men alive when the provisions were exhausted.
Page 141 - A detachment of an army was marching in regular column, with 5 men more in depth than in front ; but upon the enemy coming in sight, the front was increased by 845 men ; and by this movement the detachment was drawn up in 5 lines. Required the number of men.
Page 5 - RULE.* Divide the numerator by the denominator, and the quotient will be the whole or mixed number required.
Page 149 - ... fourth, if the multiple of the first be less than that of the second, the multiple of the third is also less than that of the fourth...
Page 168 - Three lines are in harmonical proportion, when the first is to the third, as the difference between the first and second, is to the difference between the second and third ; and the second is called a harmonic mean between the first and third. The expression 'harmonical proportion...
Page 96 - Find the value of one of the unknown quantities, in terms of the other and known quantities...
Page 146 - If the product of two quantities be equal to the product of two others, two of them may be made the extremes and the other two the means of a proportion.
Page 52 - From and after the passing of this act, all articles sold by weight shall be sold by avoirdupois weight, except gold, silver, platina, diamonds, or other precious stones, which may be sold by troy weight ; and drugs, which, when sold by retail, may be sola by apothecaries 's weight.
Page 42 - To multiply a decimal by 10, 100, 1000, &c., remove the decimal point as many places to the right as there are ciphers in the multiplier ; and if there be not places enough in the number, annex ciphers.