Question

This is an exam plz tell me fat guys...

a³-b³​

Answer 1

No cheating

Thank you

Answer 2

Answer:

a³-b³= (a – b) (a² + ab + b²)

Step by step verification:

(a3 – b3) = (a – b)(a2 + b2 + ab)

Let us prove this by considering,

a = 4 and b= 2

then,

(43 – 23) = (4 – 2)(42 + 22 + 4 × 2) ...

LHS = 56.

RHS = (a – b)(a2 + b2 + ab) RHS = (4 –2)(42 + 22 +4 × 2).

RHS = 56.

∴ LHS = RHS. (a3 – b3) = (a – b)(a2 + b2 + ab) Hence the proof.

I hope this helps...