Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form
x2 + bx = c.

-8 and 9

Add _ to each side x2 – 8x = 9 to complete the square.

16

Now that you have x² - 8x + 16 = 9 + 16, apply the square root property to the equation.

(x - 4)^2 = 25

Choose the solutions to the quadratic equation
x2 – 8x – 9 = 0.

-1 and 9

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Describe what moves you could use to create the transformation of the original image shown at right

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.