Question

Descompuneti in factori : a)(6x-5)²-9x²

b) x³-14x²+49x

c)x²+6x+8

Answer 1

a) $(6x-5)^{2}$-9$x^{2}$=(6x-5-3x)(6x-5+3x)
b) $x^{3} -14 x^{2} +49x=x( x^{2} -14x+49)=x (x-7)^{2}$
c) $x^{2} +6x+8=(x+2)(x+4)$