Question:
Factorise:
$9 x^{2}-16 y^{2}$
Solution:
$9 x^{2}-16 y^{2}$
$=(3 x)^{2}-(4 y)^{2}$
$=(3 x+4 y)(3 x-3 y) \quad\left[a^{2}-b^{2}=(a+b)(a-b)\right]$
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.