Question

How do you multiply `(4x^2-7)(x^2+4)`?

Answer 1

`4x^4+9x^2-28`

Explanation:

You would multiply the polynomials term by term and get four monomials:

`4x^2*x^2+4x^2*4-7*x^2-7*4=4x^4+16x^2-7x^2-28`

and add the like terms:

`4x^4+9x^2-28`