If 3x - 7y=10 and xy=-1,find the value of 9x square + 49y square
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(3x-7y)^2=(10)^2
9x^2+49y^2-(2×-1)=100
9x^2+49y^2+2=100
9x^2+49y^2=98
*hope this answer helped u*
9x^2+49y^2-(2×-1)=100
9x^2+49y^2+2=100
9x^2+49y^2=98
*hope this answer helped u*
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