Solving Quadratics by Factoring & Square Root

What are the zeros?

• x= 0 and x= -4
• x= 0 and x= 4
• y= 0
• x= 2

Tags

CCSS.HSF-IF.C.7A

Find the solutions for the quadratic function
x² - 6x - 27 = 0

• x = 3 and x = 9
• x = 3 and x = -9
• x = -3 and x = 9
• x = -3 and x = -9

Solve:
x² - 49 = 0

• x = -7, x = 7
• x = -7
• x = 7
• x = -7, x = 1

Tags

CCSS.HSA-REI.B.4B

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.8.EE.A.2

Solve
 3x² + 5x - 12 = 0

• x = -4/3, x = 3
• x = 4/3, x = -3
• x = -1, x = 4
• x = 1, x = -4

Tags

CCSS.HSA-REI.B.4B

Solve by factoring:
x² - 9x = 0

• 9
• 0, 9
• -9, 0
• -9

Tags

CCSS.HSA-REI.B.4B

Solve
2x² +11= -20

• ±3i
• ±i√10
• √10
• ±2i√5

Solve
(x-5)² = 25

• ±i0
• ±10
• 10, 0
• -10, 0

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

 x² - 81 = 0

• x = 11, -11
• x =±9
• x = 7, -7
• x=±9i

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Tags

CCSS.HSA-REI.B.4B