Question

hep mk vs minhf ddang caanf gaaps

 

Answer 1

Bài 8:

a: \(=x^2+x-6-x^2+8x-16=9x-22\)

b: \(=4x^2+12x-x-3-4x^2+12x-9\)

\(=23x-12\)

c: \(=16x^2-8x+1-4x^2+9=12x^2-8x+10\)

d: \(=x^3-6x^2+12x-8-x\left(x^2-9\right)+6x^2\)

\(=x^3+12x-8-x^3+9x=21x-8\)