Question

factorise (25 m²-40 mn +16n²)-49z2
one more time this question please give correct answer​

Answer 1

Answer:

Using the identity (a

2

+b

2

−2ab)=(a−b)

2

We can write it as (25m

2

+16n

2

−40mn) as

=(5m)

2

+(4n)

2

−2×5m×4n

=(5m−4n)

2

Hence, the factors are(5m−4n)(5m−4n).