Solving Quadratics with Square Root

(x - 2) ² = 9

• ± 3

• 5  or  -1

• -5  or  1

• ± 9

Solve by taking square roots:
k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no solution

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

2x²=98

• 49, -49

• 9.89, -9.89

• 7, -7

• no solution 

x² = 100

• 10

• 10 or -10

• 50

• 50 or -50

Solve using square roots.

k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no real solution

Solve by taking square roots:

5m² + 1 = 6

• m = 1

• m = 1 or -1

• m = √7

• m = 7/5 m = -7/5

2d² = 8

• 4

• -2

• -4, 4

• -2, 2

• 5, -5

• 2.23, -2.23

• 2.3

• 5

Solve by taking the square root:

4x² = 100

• x = ±10

• x = ±25

• x = ±5

• x = 5