Find the Roots of Quadratics

Solve by factoring.

b² + 2b - 24 = 0 (hint: find the zeros) FACTOR!

• x = 6 or x = -4

• x = -6 or x = -4

• x = 6 or x = 4

• x = -6 or x = 4

Tags

CCSS.HSA-REI.B.4B

What do the "Zeros" represent on a quadratic equation graph?

• x-intercepts

• y-intercepts

• vertex

• focus

Tags

CCSS.HSF-IF.C.7A

3x²+12= 39 (solve using square roots)

• x = √27

• x = ±3√27

• x = ±3

• x = ±9

Tags

CCSS.8.EE.A.2

Solve using square roots.
7b² - 4 = 59

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

Tags

CCSS.8.EE.A.2

solve using square roots

• ±81

• ±9

• ±3

• No real solution

Tags

CCSS.HSA-REI.B.4B

solve using square roots

• ±72

• ±12

• 12

• No real solution

Tags

CCSS.HSA-REI.B.4B

What are the x-intercepts of

y= x² - 9x + 14 ?

• (-7,0) and (-2,0)

• (7,0) and (-2,0)

• (7,0) and (2,0)

• (9,0) and (-14,0)

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

What are the x-intercepts (solutions)?

• (-2,0) and (2,0)

• (0,-4)

• (-2,-4) and (2,-4)

Tags

CCSS.HSF-IF.C.7A

How many roots does y=x² - 8x + 16 have?

• one

• two

• none

How many roots does y=x² + 2x - 3 have?

• one

• two

• none