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3x-4y = 8, then find 9x²+16y² = ? |
| Answer» 3X+4y=16Squaring on both sides(3x+4y)^2=256(3x)^2+(4y)^2 +24xy=2569x^2+16y^2+96=256Answer is 160In 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. | |