Question

Answer 1

giúp tui bài này zới ạ

 

Answer 2

4:

1: \(=x^3-x^2-x^3-2x^2-x-2=-3x^2-x-2\)

2: \(=x^2-xy^2-x^2y-x^2+y^2+y\)

=-xy^2-x^2y+y^2+y

3: \(=x^3+26x-5x^2-130+5-25x-x+5x^2\)

=x^3-125

4: \(=x^3+xy-x^2y-y^2-x^3-xy^2+x^2+y^2\)

=-x^2y-xy^2+x^2+xy

5: \(=6x^2-7x+2-15x^2-13x-2\)

=-9x^2-20x

6: \(=6x^2+23x-55-6x^2-23x-21\)

=-76

7: \(=2x^2-5x-12+x^2-7x+10=3x^2-12x-2\)

8: \(=48x^2-32x+5+3x-48x^2-7+112x\)

=83x-2