Question

Descompuneti in factori : a)x²-y² b) x²-9 c) 4-a² d) 9y²-16z²

Answer 1

$a).x^2-y^2=(x-y)(x+y) \\ b).x^2-9=(x-3)(x+3) \\ c).4-a^2=(2-a)(2+a) \\ d).9y^2-16z^2=(3y-4z)(3y+4z)$

Answer 2

FOLOSIM FORMULA: (a+b)(a-b)
a)(x+y)(x-y)
b)(x+3)(x-3)
c)(2+a)(2-a)
d)(3y+4z)(3y-4z)
SPER CA TE-AM AJUTAT!:3:)))))))))))))))))