Question

Compute the value of 9x2 + 4y2 if xy = 6 and 3x + 2y = 12.​

Answer 1

Answer:

${9x}^{2} + {4y}^{2} = {(3x + 2y)}^{2} - 2 \times 3x \times 4y = {(3x + 2y)}^{2} - 24xy = {(6)}^{2} - 24 \times 6 = 36 - 144 = - 108$

Answer 2

Answer:

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