Question

factorise 9 a square + 30 ab + 25 b square​

Answer 1

Answer:

9a² + 30ab + 25b²

= (3a)² + 2(3a)(5b) + (5b)²

Compare this to identity:

a² + 2ab + b² = (a + b)²

So, this is equal to:

(3a + 5b)²

= (3a + 5b)(3a + 5b)

Answer 2

Answer:

After factorising we will get the answer as

(3a+5b)²