Question

A=x³-5x²-x².(x²+x-5)

B= 2x².(x-1)+3x.(x²-x-2)-5.(3-x²)

Answer 1

\(A=x^3-5x^2-x^4-x^3+5x^2\\ A=-x^4\\ B=2x^3-2x^2+3x^3-3x^2-6x-15+5x^2\\ B=5x^3-6x-15\)

Answer 2

`A = x^3 - 5x^2 - x^4 -x^3 + 5x^2`

`= -x^4`

`B = 2x^3 - 2x^2 + 3x^3 - 3x^2 - 6x - 15 + 5x^2`

`= 5x^3 - 6x - 15`

Answer 3

`A = x^3 - 5x^2 - x^4 -x^3 + 5x^2`

`= -x^4`

`B = 2x^3 - 2x + 3x^3 - 3x^2 - 6x - 15 + 5x^2`

`= 5x^3 + 2x^2 - 8x - 15`