Georgiana10ask
a fost răspuns

Descompuneti in factori : 
a) (x-2)² - 4x²= 
b) x²+6x+9-y²= 
c) x³+x²-16x-16= 
d)x²-5x=

Răspuns :

a) = (x-2-2x)(x-2+2x) = - (x+2)(3x-2)
b) = (x+3)²-y² = (x+3-y)(x+3+y) = (x-y+3)(x+y+3)
c) = x²(x+1)-16(x+1) = (x+1)(x²-16) = (x+1)(x-4)(x+4)
d) = x(x-5)