Question

Factorize : 9x² – (x² − 4)²

Answer 1

Answer:

3x

Explanation:

Hope it will be help you

Answer 2

Values of x = +1, -1, +4, -4

Explanation:

Given: 9x² – (x² − 4)² = 0

9x² - (x^4 - 8x² + 16) = 0

9x²  - x^4 + 8x² - 16 = 0

-x^4 + 17x² - 16 = 0

x^4 - 17x² + 16 = 0

x^4 - 1x² - 16x² + 16 = 0

x² (x² - 1) - 16 (x² - 1) = 0

(x² - 1) (x² - 16) = 0

If x² - 1 = 0, x = +/- 1

If x² - 16 = 0, x = +/- 4

Hence solved.