Question

identities
(a) (3x + 7) (3x + 7)​

Answer 1

Answer:

3x) ² + 7² + 2× 3x ×7

9x² + 49 + 42x

Answer 2

Given:-

(3x + 7) (3x + 7)

According to the question:-

(3x + 7) (3x + 7)

∴ (3x + 7)²

Formula Required:-

(a + b)²= a² + 2ab + b²

As Here:-

a = 3x

b = 7

Explanation:-

(3x + 7) (3x + 7)

⇒ 3x² + 2 × 3x × 7 + 7²

⇒ 9x + 42x + 14

Answer:-

9x + 42x + 14