exam Maths Puzzle Numerical Ability

The force neeed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a fo

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This is from a worksheet. I cannot figure this one out at all.

y^3+5y^2-9y-45
The instructions are to factor completely. a. the legs of triangle GAD
b. the legs of triangle GLD
c. the common leg to the right triangles
d. the hypotenuse of triangle GLD
e. the hypotenuse of triangle GAD
f. measure