If y=-3/(2-x^2)^1/2,show that (2-x^2)dy/dx=xy

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?