Question

Factorize: 25m2 – 81n2​

Answer 1

Answer:

$25 {m}^{2} - 81 {n}^{2} \\ {(5m)}^{2} - {(9n)}^{2} \\ \\ {a}^{2} - {b}^{2} \\ = (a + b) \times (a - b) \\ \\ (5m + 9n) \times (5m - 9n)$

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Given,to factorise 25m2-81n2

=(5m)2 -(9m)2

putting according to the formula,a2-b2=(a+b)(a-b)

we get,(5m+9n)(5m-9n)