Question

Factorise : 9^2-16 y^2​

Answer 1

Correct Question:

Factorise: 9x² - 16y²

Solution:

We are given the expression ⇒ 9x² - 16y², and we have to factorise it.

Let's do!

9x² - 16y²

$\bigstar {\mathfrak {\red {Using\ the\ identity\ a^{2}-b^{2} = (a+b)(a-b)}}}$

Here,

a = (3x)²

b = (4y)²

And, as we know that 16 and 9 are perfect squares.

So,

(3x+4y) (3x-4y)

Answer:

Factorised form of 9x² - 16y² is (3x+4y) (3x-4y).