 | Andrew Bell (writer on mathematics.) - 1839 - 500 pàgines
...trinomial properly arranged (72) is a complete square of a quantity, the square of the coefficient of the middle term is equal to four times the product of the coefficients of the extreme terms.1 4. Find the cube of ж— у By actually multiplying, it is found... | |
 | Lewis Hensley - 1875 - 274 pàgines
...6x + 9, where the last term is the square of half the coefficient of x, or, more generally, whenever the square of the middle term is equal to four times the product of the extreme terms — the expression is the square of a binomial. Thus, = x— 4, and \/ 4x^ Exercises.... | |
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Prove that any trinomial is a complete square, if the square of the middle term is equal to four times the product of the first and last terms. 