Question

Factorise 49a²? + 70ab +25b².​

Answer 1

$\implies$$\large\sf{{(7a)}^{2} + 70ab + {(5b)}^{2}}$

$\implies$$\large\sf{ {7a}^{2} + (2 \times 7 \times 5)ab + {5b}^{2}}$

$\implies$$\large\sf{{(7a + 5b)}^{2}}$

Answer 2

Step-by-step explanation:

49a² + 70ab + 25b²

= (7a)² + 2 . 7a . 5b + (5b)²

= (7a + 5b)² Ans.