Question

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. What is the resulting expression?

Answer 1

Factoring the polynomial $4x^4-20x^2-3x^2 + 15$ by grouping means separation of the polynomial in two addends, each of them consists of two addends:

$4x^4-20x^2-3x^2 + 15=(4x^4-20x^2)+(-3x^2+15).$

In first brackets the common factor is $4x^2,$ in second brackets the common factor is $-3.$

Then

$(4x^4-20x^2)+(-3x^2+15)=4x^2(x^2-5)-3(x^2-5)=(x^2-5)(4x^2-3).$

Answer: correct choice is B

Answer 2

Answer:

B is correct

Step-by-step explanation: