10 баллов!!Выполните преобразование по соответствующей формуле:
а)(у+4)²=y²·y·4+4²=y²+8y+16
б)(х-7)²=...
в)(2X-3Y)²=...
г)(-3с+a)²=...
а)(у+4)²=y²·y·4+4²=y²+8y+16
б)(х-7)²=...
в)(2X-3Y)²=...
г)(-3с+a)²=...
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Answers & Comments
Verified answer
A)(y + 4)^2 = y^2 + 2*4y + 4^2 = y^2 + 8y + 16
b)
(x - 7)^2 = x^2 - 2*7x + 7^2 = x^2 - 14x + 49
c)
(2x - 3y)^2 = (2x)^2 - 2*2x*3y + (3y)^2 = 4x^2 - 12xy + 9y^2
d)
(- 3c + a)^2 = (a - 3c)^2 = a^2 - 2*3ac + (3c)^2 = a^2 - 6ac + 9c^2
Verified answer
б)(х-7)²=х²-2*х*7+7²=х²-14х+49в)(2X-3Y)²=(2х)²- 2*2х*3у+ (3у)²=4х²-12ху+9у²
г)(-3с+a)²=(а-3с)²=а²-2*а*3с+(3с)²=а²-6ас+9с²