Question

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

Answer 1

Hello Friend

$3x + 2y = 12 \\ xy = 6 \\ \\ \\ 9x {}^{2} + 4y {}^{2} \\ = > (3x + 2y) {}^{2} - 12xy \\ = > (12) {}^{2} - 12 \times 6 \\ = > 144 - 72 \\ = > 72$

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