Unit 5

Parent Function

Solve for x

Misc

100

What is the parent function of a quadratic equation?

y = x²

100

(x+5)(x+9)=0

{-5, -9}

100

x² + 10x = -21

{-7, -3}

100

What is another name for solutions?

Roots, Zeros, X-Intercepts and Solutions

100

Circle the following points that are not on the graph of y=x² - 4

(1,3)

(7, 46)

(6,30)

200

What happens to the parent function when it becomes y=-x²?

It flips!

200

(x-5)(x+3)=0

{5,-3}

200

x² - 81 = 0

{9, -9}

200

Solve:

-3 x+8

___ = _____

x 4

{-6, -2}

200

When solving a quadratic equation it must be equal to what?

Zero

300

What happens to the parent function when y=x²+1?

Moves up one

300

6(x-8)=0

{8}

300

x² = 36

{6, -6}

300

Solve:

x + 5 x + 3

_____ = ______

-2 x + 6

{-9, -4}

300

The roots of an equation cross over what?

x-axis

400

What happens to the parent function when y=x²-1?

Moved down one

400

5(x-3)=0

{3}

400

(2x - 8)(x + 4)=0

{-4, 4}

400

4x² - 5x - 12 = 0

5 plus or minus square root 217 over 8

400

Which is the following in standard form:

x(x+2)(x-15)=0

x² - 9x = 70

x³ - 4x = 8

x(x+2)(x-15)=0

500

What happens to the parent function when y=(x+1)²?

Moves to the left one

500

#15 on the review sheet

{2, 10}

500

What is our first step when solving:

x 20

_ = _

5 x

Cross multiply

x² = 100

500

3x² - 5x + 2 = 0

{1, 2/3}

500

What is Ms. DiVello's Favorite Color?

Blue!!