Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

answer on edguniuity is B i think

Factoring the polynomial by grouping means separation of the polynomial in two addends, each of them consists of two addends:

In first brackets the common factor is in second brackets the common factor is

Then

correct choice is B