 Th,e square of the sum of two numbers is equal to the square of the first number plus twice the product of the first and second, plus the square of the second.  Secondary-school Mathematics - Page 122by Robert Louis Short, William Harris Elson - 1910Full view - About this book
 | Benjamin Greenleaf - Arithmetic - 1859 - 334 pages
...without multiplying tho parts separately by the width ? ET*f G*t D F 8 20 20 # 20 5 r 400 100 That the square of the sum of two numbers is equal to the squares of the numbers, plus twice their product. Thus, 25 being equal to 20-\-5, its square is equal... | |
 | Chambers W. and R., ltd - 1859 - 344 pages
...method becomes the continuous one prescribed in the rule, the following proposition must be premised : The square of the sum of two numbers is equal to the squares of the two numbers, together with twice their product. Take any two numbers, as 20 and 5 ;... | |
 | James Bates Thomson - Arithmetic - 1860 - 440 pages
...are three figures in the given number, there must be two figures in the root; (Art. 562. Obs. 2;) but the square of the sum of two numbers, is equal to the square of the first part ad led to twice the product of the two ptirts and the square of the last part; it follows therefore... | |
 | James Bates Thomson - Arithmetic - 1862 - 428 pages
...are three figures in the given number, there must be two figures in the root; (Art. 503. Obs. 2;) but the square of the sum of two numbers, is equal to the square of tile first part ad'ied to twice the product of the two parts and the square of the last part; it follows... | |
 | Horatio Nelson Robinson - Algebra - 1863 - 432 pages
...expressing the result in words, The square of the sum of two quantities is equal to the square of the first, plus twice the product of the first and second, plus the square of the second. II. (a— b)'=(a— ¿) (a— b)=a'— 2ab+b* Or, in words, The square of the difference of two quantities... | |
 | Charles Auguste A. Briot - 1863 - 374 pages
...OF THE SQUARE AND CUBE OF THE SUM OF TWO NUMBERS. 156. The square of the sum of two numbers equals the square of the first number, plus twice the product of the first by the second, plus the square of the second. Be it given to raise the sum of 7 + 5 to the square ;... | |
 | Horatio Nelson Robinson - Algebra - 1864 - 444 pages
...the result in words, The square of the sum of tico quantities is equal to the square of the first, plus twice the product of the first -and second, plus the square of the second. . • II. (a— b)'=(a— u) (a— b) = at— 2ab+b' Or, in words, The square of the difference of... | |
 | William Rossiter - 1867 - 250 pages
...64. Or, substituting general symbols for particular numbers : Or, expressing the theorem in words, the square of the sum of two numbers is equal to the sum of the squares of the same numbers, together with twice their product. Bearing this in mind, we... | |
 | Elias Loomis - Algebra - 1868 - 386 pages
...19(6— c)— 6. Expand and reduce 66. The three following theorems have very important applications. The square of the sum of two numbers is equal to the square of the first, plus twice the product of the first ly the second, plus the square jof the second. Thus, if we multiply... | |
 | Richard Wormell - Geometry, Modern - 1868 - 286 pages
...difference of the squares of two numbers is equal to the product of their sum and difference. and. The square of the sum of two numbers is equal to the sum of the squares together with twice the product. 3rd. The square of the difference of two numbers... | |
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