Q7. If 3x + 2y = 12 and xy = 6, find the value of 9 2 + 4 2​

1 thought on “Q7. If 3x + 2y = 12 and xy = 6, find the value of 9 2 + 4 2​”

1. Answer:

   3x+2y=12

   Squaring both sides, we get

   (3x+2y)^2 = 144

   9x^2+4y^2+2×3x×2y=144

   9x^2+4y^2=144-12xy

   9x^2+4y^2=144-12×6 since xy=6

   9x^2+4y^2=144-72=72

   Therefore 9x^2+4y^2=72

   Step-by-step explanation:

   Sorry if there will be any mistakes

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