Question

Can you help me with my work

Answer 1

For this case we can do this:

`(2x+1)(x+2)=2x^2+4x+x+2=2x^2+5x+2`
`(x-7)(x^2+2x+3)=x^3+2x^2+3x-7x^2-14x-21=x^3-5x^2-11x-21`

`(3x-1)(x+5)=3x^2+15x-x-5=3x^2+14x-4`
`(x-8)(x+8)=x^2-8x+8x-64=x^2-64`
`(3x+2)(3x-2)=9x^2-6x+6x-4=9x^2-4`
`(x-4)(2x^2+3x-1)=2x^3+3x^2-x-8x^2-12x+4=2x^3-5x^2-13x-4^{}`