Question

(3x + 5) (3x + 5)
please teLL the answer using identities​

Answer 1

To find :

• (3x + 5)(3x + 5) using suitable identities

Solution :

• Identity : (a + b)(a + b) = a² + 2ab + b²

　 → (3x + 5)(3x + 5) = (3x)² + 2(3x)(5) + (5)²

　　　　　　 　　 = 9x² + 2(15x) + 25

　　　　　　 　　 = 9x² + 30x + 25

Verification :

• Now, let's verify the answer by multiplying it directly.

→ (3x + 5)(3x + 5)

= (3x × 3x) + (3x × 5) + (5 × 3x) + (5 × 5)

= (3x)² + (15x) + (15x) + (5)²

= 9x² + 2(15x) + 25

= 9x² + 30x + 25

• Hence verified !

More information :

　Identities :

• (a + b)(a + b) = a² + 2ab + b²
• (a – b)(a – b) = a² – 2ab + b²
• (a + b)(a – b) = a² – b²
• (x + a)(x + b) = x² + (a + b)x + ab

Answer 2

Step-by-step explanation:

hope it helped uhh