Question

If (3a-2b)=9 and ab=7, find the value of 9a^2+4b^2

Answer 1

(3a-2b) =9

ab=7

(3a-2b) ²=9a²-12ab+4b²

9²=9a²+4b²-12(7)

81+84=9a²+4b²

9a²+4b²=165

Answer 2

Answer:

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