Question

Find the product:

(За – 2b) (3a + 2b)

Answer 1

Given: (За – 2b)(3a + 2b)

Step-wise calculation:

This is in the form (x – y)(x + y) = x² – y²

Here, x = 3a and y = 2b

So, (3a – 2b)(3a + 2b) = (3a)² – (2b)²

(3a – 2b)(3a + 2b) = 9a² – 4b²