If 3x – 7y = 10 and xy = -1 , find the value of 9x2 + 49 y2 .
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Answered by
3
As this satisfied the given equation
Let x be 1 and y be -1
Then 3(1)-7(-1) = comes to 10
9(1*1)+49(-1*-1) comes to 9+49 = 58
Let x be 1 and y be -1
Then 3(1)-7(-1) = comes to 10
9(1*1)+49(-1*-1) comes to 9+49 = 58
Answered by
3
X=1 and y=-1
9(1)^2 +49(-1)^2
9+49=58
9(1)^2 +49(-1)^2
9+49=58
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