Question

Descompuneti in factori:
$a) \: 5x {}^{3} - 20x \\ b)(7y - 3) {}^{2} - 16 \\ c)x {}^{2} - 2x {}^{2} - 9x + 18$
Dau coroana,multumesc frumos!!!!!!​

Answer 1

Explicație pas cu pas:

5x³-20x=5x(x²-4)=5x(x+2)(x-2)

(7y-3)²-16=(7y-3+4)(7y-3-4)=(7y+1)(7y-7)=7(7y+1)(y-1)

x²-2x-9x+18=x(x-2)-9(x-2)=(x-2)(x-9)