if 3x - 2 y is equal to 5 and x y is equal to 6 evaluate 9 x square + 4 y square and 3x+2y
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3x-2y=5
xy=6
9x^2+4y^2=?
3x+2y=?
3x-2y=5
squaring on both sides
9x^2+4y^2-12xy=25
9x^2+4y^2=97
from this equation
3x+2y=?
9x^2+4y^2
rooting on both sides
3x+2y=root 97
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