Question

(a(a+b)-b(a+b) factorizacion

Answer 1

`\left(a\left(a+b\right)-b\left(a+b\right)\right)`
We take:

`a\left(a+b\right)`
And aply the law of the exponents:

`=a^2+ab`
we do the same process at the other side and we get:

`=a^2+ab-ab-b^2`
Now:

`+ab-ab=0`
So we get that:

`=a^2-b^2`