Question

factorise 9x^2 - 5 and verify​

Answer 1

ANSWER:-

$9x {}^{2} - \sqrt{5} {}^{2}$

(3x)^2 - (√5)^2

We know that,

${a}^{2} - {b}^{2} = (a + b)(a - b)$

So,

(3x+√5) ( 3x-√5)

x = -√5/3 and +√5/3.

Hope it helps!!!