Question

đây là mặt 1 giúp mình nha

Answer 1

Bài 3:

a: A=(3x+7)(2x+3)-(3x-5)(2x+11)

\(=6x^2+9x+14x+21-6x^2-33x+10x+55=76\)

b: \(\left(x^2-2\right)\left(x^2+x-1\right)-x\left(x^3+x^2-3x-2\right)\)

\(=x^4+x^3-x^2-2x^2-2x+2-x^4-x^3+3x^2+2x=2\)

c: x(x^3+x^2-3x-2)-(x^2-2)(x^2+x-1)

=-2

d: =2x^2+x-x^3-2x^2+x^3-x+3

=3

e: =x^3+1-x^3+1

=2

f: =8x^3+27-8x^3+2

=29