Răspuns:
Explicație pas cu pas:
a)x(x²-9)=x(x-3)(x+3)
b)x(x²+6x+9)=x(x+3)²
d)3x(x²-5)=3x(x-√5)(x+√5)
e)x³(4x²-1)=x³(2x-1)(2x+1)
g) x²-2x-7x+14=(x-2)(x-7)
h) 2x²+2x+3x+3=2x(x+1)+3(x+1)=(x+1)(2x+3)
j) x²-11x-4x+44=(x-11)(x-4)
k)x²+5x-4x-20=x(x+5)-4(x+5)=(x+5)(x-4)
