3x-4y = 8, then find 9x²+16y² = ?
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Answer:
3x+4y=16
Squaring on both sides
(3x+4y)^2=256
(3x)^2+(4y)^2 +24xy=256
9x^2+16y^2+96=256
Answer is 160
In fact, it is mainly required to find out Y equation connecting x, and xy, and y.
When a is the angle the perpendicular making the axis of x, then you need to find out the equation of straight line y.
We need to find values of x and y which satisfy both equations.
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