Question

Simplif (x2+16)(x2_16) =?

Answer 1

Explanation:

(x²+16)(x²-16) = (x²)² - 16² = x^4 - 256 use identity a²-b² = (a-b)(a+b)

Answer 2

`x^(4)` - 256

Explanation:

Each term in the second factor is multiplied by each term in the first factor, that is

x²(x² - 16) + 16(x² - 16) ← distribute both parenthesis

=
`x^(4)` - 16x² + 16x² - 256 ← collect like terms

=
`x^(4)` - 256