Question

find the cube of 5a-3b​

Answer 1

Answer:

Hope it helps you.

Step-by-step explanation:

ANSWER

5a+3b

Cubing, we get

=(5a+3b)

3

We know,

(a+b)

3

=a

3

+b

3

+3a

2

b+3ab

2

Thus,

(5a+3b)

3

=(5a)

3

+(3b)

3

+3(5a)

2

(3b)+3(5a)(3b)

2

=125a

3

+27b

3

+225a

2

b+135ab

2