Question

Enter the correct answer in the box.

What is the completely factored form of this expression?
162 - 50x4
Write all factors in standard form.

Answer 1

Explanation:

if I understand you correctly the expression is

162 - 50x⁴

the first thing we can do is factor out a constant 2 :

2(81 - 25x⁴)

for the rest we remember :

(a + b)(a - b) = a² - b²

so, we see

a² = 81

b² = 25x⁴

and we can factor this into

2(9 + 5x²)(9 - 5x²)