Can someone me , slope is not making sense to me at all. i need on the second

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

Is a square always, sometimes, or never a parallelogram