 | Edward Olney - 1880 - 354 páginas
...square of the first, minus twice the product of the two, plus the square of the second. 87. THEO. — The product of the sum and difference of two quantities is equal to the difference of their squares. The demonstration of these three theorems consists in multiplying x + у by x + y, x — у by x —... | |
 | James Mackean - 1881 - 510 páginas
...III. Multiply a + b by a - b. a + b a - b а2+ ab - ab -V2 a2 -62 Л (a + 6)(а- 6) = a2 -62. That is, the product of the sum and difference of two quantities is equal to the difference of the squares of the quantities. IV. Multiply a2 - o6 + 62 by a + b. a? -ab +62 a +b +63 That is, if... | |
 | William James Milne - 1881 - 360 páginas
...the quantities ? 2. What sign connects the terms? 79. PRINCIPLE. — The product of the sum and the difference of two quantities is equal to the difference of their squares. 26. (r + *)(r—s). 27. (m -fn) (m — n). 28. (c + a)(c — a). 29. (*-!)(*+!). EXAMPLES. 31. 32.... | |
 | Edward Olney - 1882 - 358 páginas
...square of the first, minus twice the product of the two, plus the square of the second, 87. THEO. — The product of the sum and difference of two quantities is equal to the difference of their squares. EXAMPLES. 1. Multiply together 3ax, — Загхг, <íby, — у3, and 2хгуг. 2. Multiply together... | |
 | Edwin Pliny Seaver, George Augustus Walton - 1881 - 304 páginas
...Two Quantities. 133. We learn by multiplication that which means that the product of the sum and the difference of two quantities is equal to the difference of their squares. Reversing this formula, we have 134. Exercises. Separate into two factors 78. a 2 -af. 88. 47, 4 -1GPm... | |
 | Popular educator - 1884 - 910 páginas
...— = aa aaa aaaaa If a + Ъ be multiplied into о — b, the product will bo a*— Tf ; that is — The product of the sum and difference of two quantities is equal to the difference of their squares. This is an instance of the facility with which general truths are demonstrated in algebra. If the sum... | |
 | Webster Wells - 1885 - 368 páginas
...plus the square of the second. In the third case, we have (a + b) (a — 6) = a2 — b2. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares. EXAMPLES. 96. 1. Square 3 a + 2 be. The square of the first term is 9 a2, twice the product of the... | |
 | Webster Wells - 1885 - 370 páginas
...plus the square of the second. In the third case, we have (a -\-b)(a — b) = a2 — 62. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares. EXAMPLES. 96. 1 . Square 3 a + 2 be. The square of the first term is 9 a2, twice the product of the... | |
 | Webster Wells - 1885 - 324 páginas
...plus the square of the second. In the third case, we have (a + b) (a — b) = a2 — b-. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares. EXAMPLES. 96. 1. Square 3а +2bc. The square of the first term is 9 a2, twice the product of the terms... | |
 | John Bernard Clarke - 1889 - 566 páginas
...~product is made up as stated in the proposition. — mn 4- »* m 2 — 2m» 4- " 2 71. Theorem.—The product of the sum and difference of two quantities is equal to the difference of their squares. If a and 6 represent the quantities, show by direct multiplication that (a + b) (a—6) = o« — b... | |
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... the product of the two, plus the square of the second. In the third case, we have (a + b) (a — 6) = a2 — b2. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares. 
