Find the number of solutions of the equation. 0 = x2 + 2x + 9

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

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

What is the simplified form of square root of 400 to the 100th power ?