Question

9(x+a)²-4x²
Factorise the above sum

Answer 1

Please tell me is this answer right or wrong?

Answer 2

Answer:

x(5x + 2a) + a^2

Step-by-step explanation:

Given,

P(x) = 9(x + a)^2 - 4x^2

=> 9(x^2 + a^2 + 2ax) - 4x^2 = 0

=> 9x^2 + a^2 + 2ax - 4x^2 = 0

=> 5x^2 + a^2 + 2ax = 0

=> x(5x + 2a) + a^2 = 0

Hence, the required answer = x(5x + 2a) + a^2