Question

I dont know how to do it​

Answer 1

`8x^(2) +10x`.

Explanation:

Split them into sections.

The first one is
`x(2x+1)`, which is
`2x^(2) +x`.

The second one is
`(2x+x)(2x+3)`, which is
`6x^(2) +9x`.

Add
`2x^(2) +x` and
`6x^(2) +9x`, which is equal to
`8x^(2) +10x`.

Hope I helped!