Q2 of 157 Page 22

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

∵ (a² – b²) = (a – b) × (a + b)

∴ (3x + 2) (3x – 2) = (3x)² – (2²)

⇒ (3x + 2) (3x – 2) = (9x² – 4)

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

(2x – 5) (2x – 5)

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

(5a – 3b) (5a – 3b)

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

(2l – 3m) (2l + 3m)

Questions · 157

1. Algebra

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