What is the value of (a - b)3 - a3 + b3 ?
Answer & explanation
Correct answer: option 4
(a - b)3 - a3 + b3
= a3 - b3 - 3ab(a-b) - a3 + b3
= -3ab (a - b)
What is the value of (a - b)3 - a3 + b3 ?
Correct answer: option 4
(a - b)3 - a3 + b3
= a3 - b3 - 3ab(a-b) - a3 + b3
= -3ab (a - b)