(w – 2.5)(w + 2.5)
(–4v – 9)(–4v + 9)
step-by-step explanation:
or
we need to solve for 'x' the following equation:
we have that:
⇒
⇒ ⇒
factorizing, we get that:
then, the solutions are: or
nothing extraneous has been found!