Solving Equations with Square Roots

Solve for x: x² = 49

• x = 7 or -7

• x = 6

• x = -6

• x = 8

The solution for x in the equation x² = 36 is (a)  

• x = ±6
• x = 6
• x = -7
• x = ±7

x² = 16

• x = ±4

• x = 4

• x = -8

• x = ±8

Solve for x: x² = 81.

• x = ±9

• x = -9

• x = -7

• x = ±7

Solve for x: x² = 64.

• x = -4
• x = 8 or x = -8

• x = 4
• x = -4 or x = 4

The solution for x in the equation x² = 25 is (a)  

• x = ±10
• x = 10
• x = -10
• x = 5 or x = -5

Solve for x: x² = 121.

• x = ±11

• x = 11

• x = -11

• x = 0

Solve for x: x² = 9.

• x = 3, x = -3
• x = 6
• x = 0
• x = -6

The value of x that satisfies the equation x² = 144 is (a)   .

• x = ±12
• x = 12
• x = -12
• x = ±11

Solve for x: x² = 100.

• x = 10 or x = -10

• 15
• x = 5 or x=-5

• 5