Solve Quadratics by Graphing and Square Root

What is another way to say "where a function crosses the x-axis"? Select all that apply.

• x-intercept

• root

• zero

• y-intercept

Tags

CCSS.HSF-IF.C.7C

• -2 and 3

• 2 and -3

• only 2

• only 3

Tags

CCSS.HSA-REI.B.4B

• x = 9 or x = -9

• no solutions

• x = 2 or x = -2

• x = 81 or x = -81

Tags

CCSS.HSA-REI.B.4B

What is this formula?

• This is the speed of light formula.

• This is the quadratic formula.

• This is the zero product property.

• This is scary.

Tags

CCSS.HSA-REI.B.4B

Solve the quadratic equation by graphing.

a² + 10a + 21 = 0

• ± √21

• -3 , -7

• 3 , 7

• 28 , -7

Solve using the square root property. 4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

Tags

CCSS.HSA-REI.B.4B

Which answer below has the correct zero's

• 2 and -5

• -10 and -3

• -2 and 5

• -1 and 10

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

What are the zero's of this quadratic? Graph it!

• 0 and 2

• -2 and 0

• .5 and 2

• -2 and 2

Solve using the square root property.

x² = 16

• ± 4

• ± 8

• 4

• 8

Tags

CCSS.HSA-REI.B.4B

How many solutions does this function have?

• two

• one

• all real numbers

• no real solutions