Question

x^2-2x-22499 factorisation​

Answer 1

Answer:

(x - 151)(x - 149)

Explanation:

I'll be factoring it by completing the square method.

x² - 2x - 22499 = 0

x² - 2x(1) = 22499

Adding 1 on both sides,

x² - 2(x)(1) + 1² = 22500

Compare this to the identity : a² - 2ab + b² = (a+b)²

So,

(x + 1)² = 22500

x + 1 = ±√22500 = ±150

x = ±150 - 1

So two values of x are : x = 151 & x = 149

Therefore, x² - 2x - 22499 = (x - 151)(x - 149) = 0

Answer 2

Answer:

I think this is the answer