1. If 3x + 4y = 16 and xy = 4; find the value of
9x² + 16y².
Answers
Answered by
1
Step-by-step explanation:
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.
Similar questions