use suitable identity (2a-3b) ²+(2a+3b)²
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Answer:
8a^2 + 18b^2
Step-by-step explanation:
Using Identity a^2 + b^2 =(a+b)^2 - 2ab
(2a-3b) ²+(2a+3b)²= [(2a-3b) + (2a+3b)]^2 - 2(2a-3b)(2a+3b)
=> (4a)^2 - 2(4a^2-9b^2)
=> 16a^2 - 8a^2 + 18b^2
=> 8a^2 + 18b^2
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