Question

Answer 1

\(P\left(x\right)=-3x^2+4x-x^3+x^2+3x^4-1\\ =3x^4-x^3+\left(-3x^2+x^2\right)+4x-1\\ =3x^4-x^3-2x^2+4x-1\\ Q\left(x\right)=3x^4-x^2+x^3-2x-1-2x^3\\ =3x^4+\left(x^3-2x^3\right)-x^2-2x-1\\ =3x^4-x^3-x^2-2x-1\)

Answer 2

Answer 3

+)

\(P\left(x\right)=-3x^2+4x-x^3+x^2+3x^4-1\)

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

          \(=-2x^2+4x-x^3+3x^4-1\)

          \(=3x^4-x^3-2x^2+4x-1\)

+)

\(Q\left(x\right)=3x^4-x^2+x^3-2x-1-2x^3\)

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

          \(=3x^4-x^2-x^3-2x-1\)

          \(=3x^4-x^3-x^2-2x-1\)