Solving Quadratic Equations: Quadratic Formula — Unit test Answers

Solve x2 – 8x = 20 by completing the square. Which is the solution set of the equation?

Two numbers are 10 units away in different directions from their midpoint, m, on a number line. The product of the numbers is –99.

What is a solution to (x + 6)(x + 2) = 60?

Solve x2 − 24x = −80 by completing the square.What is the solution set of the equation?

Between which two ordered pairs does the graph of f(x) = x2 + x – 9 cross the negative x-axis?Quadratic formula: x =

Which rule can be used to describe the growth of the y-values of the function over each interval from to ?

Clara writes the equation (x – 13)(x + 8) = 196 to solve for the missing side length of a rectangle represented by the factor x + 8. What is the missing side length represented by x + 8 units of the rectangle?

Mariya is solving the quadratic equation by completing the square.4x2-20x+3=04x2-20x=-3A(x2-5x)=-3

Fiona is completing the square to solve the polynomial equation.x2 – 4x + 1 = 0

The first few steps in solving the quadratic equation 5x2 + 27x = 14 − 13x by completing the square are shown.5x2 + 27x = 14 − 13x5x2 + 40x = 145(x2 + 8x) = 14

Which is a solution to the equation?(x − 3)(x − 5) = 35

Solve x2 + 6x = 7 by completing the square. Which is the solution set of the equation?

Using the Completing the Square method, what are the zeros of the quadratic function f(x) = 2x2 + 8x – 3?

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Over which interval does the exponential show a more rapid rate of change?