Question

Scoateti factor comun pe (x-3)
a) (x+1)(x-3)+(x-3)(5x+2)
b) (2x+5) (x-3) +(x-3)(x-2)
c) (3x-1)(x-3)+(x-3)
d) (x-3)(x-2)-(x-3).
Si atata va rog ajutatima !!!

Answer 1

a) (x-3)[(x+1)+(5x+2)]=(x-3)(x+1+5x+2)=(x-3)(6x+3)=3(x-3)(2x+1)

b)(x-3)(2x+5+x-2)=(x-3)(3x+3)=3(x-3)(x+1)

c) (x-3)(3x-1+1)=(x-3)3x

d) (x-3)(x-2-1)=(x-3)(x-3)=x²-3x-3x+9=x²-6x+9