Question

If a -­ b = 3 and ab =28, then a3 - b3 is

A) 279 B) 387 C) 513 D) 91

Answer 1

Step-by-step explanation:

a = 7 and b = 4

so,

7 × 7 × 7 - 4 × 4 ×4

343 - 64

279 is Your Answer...

Marks As Brainlist..

Answer 2

Answer:

279

Step-by-step explanation:

a - b = 3

ab = 28

a^3 - b^3 = ?

= If we put the value of a=7 and b=4

= 7 - 4 = 3

= 7 × 4 = 28

And 7^3 - 4^3 = ?

= 343 - 64 = 279

Answer.......

Hope its help you......

Thanks for asking !