4x4 -25x2 +36=?

4x⁴ -25x² +36=?

A (x + 2)(x - 2)(2x + 3)(2x - 3)

B (2x + 1)(2x - 1)(2 + 6)(x - 6)

C (x + 3)(x - 3)(2x + 2)(2x - 2)

D (x + 2)(2x - 3)(2x + 3)(3x + 2)

Correct Answer: Option A

4x⁴-25x²+36
= 4x⁴-9x²-16x²+36
=x²(4x²-9)-4(4x²-9)
=(x²-4) (4x²-9)
=(x+2)(x-2)(2x+3)(2x-3)