Question

find the product of :
$(a + 2b) \: (a - 2b) \: ( {a}^{2} + 4 {b}^{2} )$
​

Answer 1

Answer:

(a+2b)(a-2b)(a²+4b²)

= (a²-4b²)(a²+4b²)

= [(a²)² -(4b²)²]