Math, asked by testsix81241, 3 months ago

2a square +9b square if 2a+3b=21
ab=15 evalute

Answers

Answered by dkchakrabarty01

0

Answer:

question is wrong. It should be 4a2+9b^2

(2a+3b)^2=4a^2+9b^2+2.2a.3b

(21)^2=4a^2+9b^2+12.ab

441=4a^2+9b^2+12×15

4a^2+9b^2=441-180=261 Ans

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