Question

Descompuneti in factori folosind foemula a²-b²=(a-b)(a+b):
a)x²-36=
b)x²-49=
c)x²-64=
d)x²-81=

Answer 1

a) x^2 -36 = ( X+6)(x-6) b) x^2-49=(X+7)(x-7) c) x^2-64= ( x +8)( x -8) d) x^2 -81=(x+9)(x-9)