Question

(5a + b)²=

(3y + y²) (3y - y²)=

(a² + 7) (a² - 9)=

ayuda :'(
son "productos notables"

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Answer 1

1) (5a+b)2 =
(5a)2+2x5ab+b2
25a2+2x5ab+b2
25a2+10ab+b2

2) (3y+y2) (3y-y2)=
(3y)2-(y2)2
9y2- (y2)2
9y2-y4

3) (a2+7) (a2-9)=
(2a+7) x (ax2-9)
(2a+7) x (2a-9)
4a2-18a+14a-63
4a2-4a-63