Question

(3a+5b)³-(3a-5b)³
answer it​

Answer 1

Answer:

we know that,

(a+b)^2=a^3+3a^2b+3ab^2+b^3

now,

(3a+5b)^3- (3a-5b)^3

=>(3a+5b)^3= 27a^3+135a^2b+225ab^2+125b^3

and, (3a-5b)^3= 27a^3+675a^2b-225ab^2+125

=> 450ab^2 =Answer