Alg1 9.4 - Solving quadratics equations using Square Roots

Solve each equation by inspection: x² = 256

• 5

• 10

• 16

• 12

Solve each equation by inspection: x² = 144

• x = +5 and -5

• x = +4 and -4

• x = 11

• x = +12 and -12

Solve each equation by inspection: x² = 81

• x = 9

• x = -9

• x = 81

• Both x = 9 and x = -9

Solve each equation by inspection: x² = 25

• ± 5

• ± 7

• ± 9

• ± 11

Solve each equation by inspection: x² = 36

• ± 6

• ± 4

• ± 9

• ± 11

Solve each equation by inspection: x² = -49

• Not Possible, since we cannot take the square root of a negative number

• ± 6

• ± 7

• ± 8

Solve each equation by inspection: x² + 7 = 23

• Not Possible, since we cannot take the square root of a negative number

• ± 6

• ± 4

• ± 8

Solve each equation by inspection: x² + 24 = 25

• ± 2

• ± 1

• ± 3

• ± 5

Solve each equation by inspection: x² - 1 = 3

• ± 2

• ± 1

• ± 3

• ± 5

Solve each equation by inspection: x² - 8 = 1

• ± 2

• ± 1

• ± 3

• ± 5