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Question
`(("a" + "b")("a"^3 - "b"^3))/(("a"^2 - "b"^2))` = ___________
Options
a2 – ab + b2
a2 + ab + b2
a2 + 2ab + b2
a2 – 2ab + b2
Solution
a2 + ab + b2
Explanation;
Hint:
`(("a" + "b")("a"^3 - "b"^3))/(("a"^2 - "b"^2)) = (("a" + "b")("a" - "b")("a"^2 + "ab" + "b"^2))/(("a" + "b")("a" - "b"))`
= a2 + ab + b2
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