Question

Tính:

a) \(\left(x^2-2\right).\left(1-x\right)+\left(x+3\right).\left(x^2-3x+9\right)\)

b) \(\left(2x^4+x^3-3x^2+4x-3\right):\left(x^2-x+1\right)\)

Answer 1

a: \(=x^2-x^3-2+2x+x^3+27=x^2+2x+25\)

b: \(=\dfrac{2x^4-2x^3+2x^2+3x^3-3x^2+3x-2x^2+2x-2-x-1}{x^2-x+1}\)

\(=2x^2+3x-2+\dfrac{-x-1}{x^2-x+1}\)