Question

I keep forgetting the process for this: 3(x^2 + 5)(x^2 - 5) Can someone help?

Answer 1

Answer:

see explanation

Step-by-step explanation:

Note that (x² + 5)(x² - 5) are the factors of a difference of squares

a² - b²  = (a + b)(a - b)

with a = x² and b = 5, hence

(x² + 5)(x² - 5) = (x²)² - 5² = $x^{4}$ - 25, thus

3($x^{4}$ - 25) = 3$x^{4}$ - 75