Q2 of 157 Page 22

Using a suitable identity, find each of the following products:
(2l – 3m) (2l + 3m)

∵ (a² – b²) = (a – b) × (a + b)

∴ (2l – 3m) (2l + 3m) = (2l)² – (3m)²

⇒ (2l – 3m) (2l + 3m) = 4l² – 9m²

Using a suitable identity, find each of the following products:

(3x + 2) (3x – 2)

Using a suitable identity, find each of the following products:

(5a – 3b) (5a – 3b)

Using a suitable identity, find each of the following products:

Questions · 157

1. Algebra

1 1 1 1 1 1 1 2 3 4 5 6 1 2 3 4 5 5 5 5 5 6 6 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 6 6 7 8 9 10 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 1 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2

Using a suitable identity, find each of the following products:(2l – 3m) (2l + 3m)