Solutions to Quadratics Using Square Roots

What are the solutions?

• 0 and 8

• -2 and -4

• 3 and -1

• 2 and 4

Solve by taking square roots:
3 + 9r² = 12

• r = 0

• no solution

• r = 3, r = -3

• r = 1, r = -1

Solve
(x-5)² = 25

• ±0

• ±10

• 10, 0

• -10, 0

Solve
(x+3)²-5 = 9

• ±√14 -3

• √14 - 3

• ±11

• ±5

Solve by factoring
(x - 2 )² = 49

• -5, 9

• ^{7, -7}

• 9, -5

• ^{9, -9}

How many solutions are there?

• 0

• 1

• 2

• Cannot be determined

Which method of solving quadratics would you use to solve the following:

• Completing the Square

• ZPP

• Square Roots

Choose the best method to solve this quadratic:

​ (a)  

3x² - 21 = 3

• Square Roots

• ZPP

• Quadratic Formula

Choose the best method to solve this quadratic:

​ (a)  

2(x + 2)² - 5 = 8

• Square Roots

• Quadratic Formula

• ZPP

Which method of solving quadratics would you use to solve the following:

• Completing the Square

• ZPP

• Square Roots