Đáp án:
a, 36.x3y2−2x4y+2x2y2
b, x+24
c, x+24
d, 3(x+4)4
Giải thích các bước giải:
a, 36.x3y2−2x4y+2x2y2
b, 2x3−3x2+10x−15x−8x+12=2x3−3x2−13x+12
c, x+22−x2−48+x−22=x2−42(x−2)−8+2(x+2)=x2−44x−8=(x−2).(x+2)4(x−2)=x+24
d, (x+4)24(x+3).3(x+3)(x+4)=3(x+4)4