Q4 of 157 Page 22

Find out the following squares by using the identities:
(3x + 5)²

Given (3x + 5)²

We know that

(a+ b)² = a² + b² + 2a×b

⇒ (3x + 5)² = ((3x)² + (5)² + 2×3x×5)

⇒ (3x + 5)² = 9x² + 25 + 30x

Find out the following squares by using the identities:

(p – q)²

Find out the following squares by using the identities:

(a – 5)²

Find out the following squares by using the identities:

(5x – 4)²

Find out the following squares by using the identities:

(7x + 3y)²

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

Find out the following squares by using the identities:(3x + 5)2