Question

using proper identity , the expansion of (3+5 c ) (3+5 c ) is​

Answer 1

Answer:

here is your answer

Step-by-step explanation:

A^2+2ab+b^2

3^2+2(3×5c)+5c^2

3^2+30c+25c^2

9+30c+25c^2

Answer 2

Answer:

★ (3+5c)(3+5c)

= (3+5c)²

= 3² + 2 × 3 × 5c + (5c)²

= 9 + 30c + 25c²

= 25c² + 30 c + 9

Identity required :—

${\boxed {\color{red}{ \bold{ {† \: \: \: (x + y)}^{2} = {x}^{2} + 2xy + {y}^{2} \: \: \: \: †}}}}$