Rút gọn các biểu thức sau: (x+5) (x^2 −5x +25) −x(x−4)^2 +16x
Giải thích
x+5x2−5x+25−xx−42+16x=x+5x2−5.x+52−xx2−8x+16+16x=x3+53−x3−8x2+16x+16x=x3+125−x3+8x2−16x+16x=8x2+125
x+5x2−5x+25−xx−42+16x=x+5x2−5.x+52−xx2−8x+16+16x=x3+53−x3−8x2+16x+16x=x3+125−x3+8x2−16x+16x=8x2+125