Question

factories the following:
1 . x^2+ 2xy + y^2 - 16
2. 169x^2 - ( 49x^4 - 56x^2y^2 + 16y^2​

Answer 1

 use this formula below

(a+b)²=a²+2ab+b²

a²+b²=(a+b)(a-b)

1st equation,

. x²+ 2xy + y² - 16

(x+y)²-16

(x+y)²-(4)²

(x+y-4)(x+y+4)

(x-4+y)(x+4+y)