Question

Cần gấp ạk tks

Answer 1

`a)`

`@A(x)=5x-8x+2x^2-9x^3+1`

  `A(x)=-9x^3+2x^2-3x+1`

`@B(x)=x^3-5x-2x^2+6x-2`

  `B(x)=x^3-2x^2+x-2`

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`b)A(x)+B(x)=-9x^3+2x^2-3x+1+x^3-2x^2+x-2`

                 `=-8x^3-2x-1`

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`c)A(x)-B(x)=-9x^3+2x^2-3x+1-x^3+2x^2-x+2`

                `=-10x^3+4x^2-4x+3`

Answer 2

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

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

b)\(A\left(x\right)+B\left(x\right)=9x^3+2x^2-3x+1+x^3-2x^2+x-2\)

\(A\left(x\right)+B\left(x\right)=-8x^3-2x-1\)

c)\(A\left(x\right)-B\left(x\right)=-9x^3+2x^2-3x+1-x^3+2x^2-x+2\)

\(A\left(x\right)-B\left(x\right)=-10x^3+4x^2-4x+3\)

Answer 3