if 9x2 + 16y2 = 60 and 3x + 4y = 6, then the value of xy is
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9x^2 + 16y^2=60
3x + 4y = 6
(3x + 4y)^2= 6^2
9x^2 + 16y^2+24xy=36........eq1
substituting the value of 9x^2 + 16y^2 in eq1
60+24xy=36
24xy=36-60
24xy=-24
xy=-1
hope this helps!!
3x + 4y = 6
(3x + 4y)^2= 6^2
9x^2 + 16y^2+24xy=36........eq1
substituting the value of 9x^2 + 16y^2 in eq1
60+24xy=36
24xy=36-60
24xy=-24
xy=-1
hope this helps!!
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