Question

Factorise 216 a cube + 343 b cube + 756 a square b + 882 ab square​

Answer 1

Answer:

Step-by-step explanation:

= (6a)³+(7b)³+3(6a)(7b){6a+7b}

Using identity ,

(a+b)³= a³+b³+3ab(a+b)

Where

a= 6a

And b= 7b

Thus we can easily factorise it by using this identity,

= (6a+7b)³