Question

M(x) = \(3x^4\) - \(2x^3\) + \(x^2\) -4x+5

N(x)=\(2x^3\) + \(x^2\) - 4x -5

tính M (x) + N(x)

Answer 1

\(M\left(x\right)+N\left(x\right)=3x^4-2x^3+x^2-4x+5+2x^3+x^2-4x-5\\ =3x^4+\left(-2x^3+2x^3\right)+\left(x^2+x^2\right)+\left(-4x-4x\right)+\left(5-5\right)\\ =3x^4+2x^2-8x\)