Question

Which equation is equivalent

Answer 1

The answer is the second choice ///////////

Answer 2

(4x^2 +9) (4x^2 -9) =0

Explanation:

16x^4 - 81 =0

Rewriting

(4x^2) ^2 - 9^2 =0

This is the difference of squares a^2 -b^2 = (a+b)(a-b)

(4x^2 +9) (4x^2 -9)=0