Question

calculate the value of 9 X square + 4 y square if x y = 6 and 3 X + 2y = 12​

Answer 1

Answer:

9x² + 4y² = 72

Step-by-step explanation:

(3x+2y)² = 9x² + 12xy + 4y² = (12)²..................[∵ 3x + 2y = 12]

9x² + 12xy + 4y² = 144

9x² + 4y² = 144 - 12xy

9x² + 4y² = 144 - 12(6)..........................................[∵ xy = 6]

9x² + 4y² = 144 - 72

9x² + 4y² = 72

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Answer 2

here is your ans.

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