Question

Factorise 4m ^ 2 + 49n ^ 2 - 28mn​

Answer 1

Step-by-step explanation:

$4 {m}^{2} - 28mn + 49 {n}^{2}$

$= ( {2m)}^{2} - 2 \times 2m \times 7n + ( {7n)}^{2}$

$= ( {2m - 7n)}^{2}$