Please help me with this

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1