Solving Quadratics and Complex Numbers

Solve using square roots:

x² - 49 = 0

• x = -7, x = 7

• x = -7

• x = 7

• x = -7, x = 1

Tags

CCSS.8.EE.A.2

Solve using square roots

• √3

• ±√3

• -3

• No real solution

Tags

CCSS.HSA-REI.B.4B

4b² - 16 = 0.

• 4 and -7

• 7 and -4

• 2 and -2

Tags

CCSS.HSA-REI.B.4B

Solve by taking square roots:
4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

Tags

CCSS.HSA-REI.B.4B

What would be the best method to solve this quadratic? (You don't have to solve!)

• Factoring

• Square roots

• Completing the square

• Quadratic formula

Tags

CCSS.HSA-REI.B.4B

What would be the best method to solve this quadratic? (You don't have to solve!)

• Factoring

• Square roots

• Completing the square

• Quadratic formula

Tags

CCSS.HSA-REI.B.4B

What would be the best method to solve this quadratic? (You don't have to solve!)

• Factoring

• Square roots

• Completing the square

• Quadratic formula

Tags

CCSS.HSA-REI.B.4B

Solve by factoring

12x² + 8x = 0

• x = 0, -2/3

• x = 0

• x = 3/2, 0

• x = 4

Tags

CCSS.HSA-REI.B.4B

• Yes, she factored correctly and then used the zero product property

• No, she didn't factor correctly so the rest of her work is wrong.

• No, she did not set the equation equal to zero before factoring.

• Yes, she answered it correctly.

Tags

CCSS.HSA-REI.B.4B

• A.

  Divide both sides f the equation by 3.

• B.

  Take the square root of both sides of the equation.

• C.

  Subtract 12 from both sides of the equation.

• D.

  Find two values with a sum of 5 and a product of 12.

Tags

CCSS.HSA-REI.B.4B