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Scoateti factor comun pe x-3
a) (x+1)(x-3)+(x-3)(5x+2)
b) (2x+5)(x-3)+(x-3)(x-2)


Răspuns :

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

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