Question

A = x² ( x - 2 ) + x ( 1 - x ) + x ( 2x + 3 ) - 5x ( x + 1 )

A = ( 5x - 1 ) ( x + 3 ) - ( x - 2 ) ( 5x - 4 )

A = x² ( 11x - 2 ) + x² ( x - 1 ) - 3x ( 4x² - x - 2 )

Answer 1

`@`\(A=x^2\left(x-2\right)+x\left(1-x\right)+x\left(2x+3\right)-5x\left(x+1\right)\)

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

    \(=x^3-5x^2-x\)

`@`\(A=\left(5x-1\right)\left(x+3\right)-\left(x-2\right)\left(5x-4\right)\)

       \(=5x^2+15x-x-3-5x^2+4x+10x-8\)

       \(=28x-11\)

`@`\(A=x^2\left(11x-2\right)+x^2\left(x-1\right)-3x\left(4x^2-x-2\right)\)

        \(=11x^3-2x^2+x^3-x^2-12x^3+3x^2+6x\)

     \(=6x\)