[17. Simplify:
(i) [a²- b²] - [2a² + b²]
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Answer:
=−a2−2b2
Step-by-step explanation:
Let's simplify step-by-step.
a2−b2−(2a2+b2)
Distribute the Negative Sign:
=a2−b2+−1(2a2+b2)
=a2+−b2+−1(2a2)+−1b2
=a2+−b2+−2a2+−b2
Combine Like Terms:
=a2+−b2+−2a2+−b2
=(a2+−2a2)+(−b2+−b2)
=−a2+−2b2
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