Question

Descompuneti in factorii:
a)x^2-y^2
b)x^2-9
c)4-a^2
d)9y^2-16z^2
e)25x^2-9y^2
f)a^2b^2-49

Answer 1

a)x²-y² =(x+y)(x-y)
b)x²-9=(x+3)(x-3)
c)4-a²=(2-a)(2+a)
d)9y²-16z² =(3y+4z)(3y-4z)
e)25x²-9y²=(5x+3y)(5x-3y)
f)a²b²-49 =(ab+7)(ab-7)