👤

Descompuneti in factori: a) (3x-1)^2-4(x+1)^2
b) (4x-3)^2-9(x+2)^2


Răspuns :

a) (3x-1-2x-2)(3x-1+2x+1) = 5x(x-3)
b) (4x-3-3x-6)(4x-3+3x+6) = (x-9)(7x+3)