If 3x + 2y = 12 and xy = 6, find the value of 9x 2 + 4y 2 .
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Answered by
1
3x +2y = 12
on sq
9x^2 + 4y^2 + 12xy =144
we know xy = 6
9x^2 + 4y^2 = 72
pls mark brainliest
Answered by
1
Answer:
72
Step-by-step explanation:
Given,
3x+2y=12 , xy=6
(3x+2y)^2 =12^2
=9x^2+4y^2+12xy=144
ie, 9x^2+4y^2+(12×6)=144
=9x^2+4y^2+72=144
9x^2+4y^2=144-72
=72.
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