Extracting the Root

Solve: x² - 225 = 0

• 14

• 15

• 16

• 17

What are the roots / solutions of the quadratic equation 3x² = 300 ?

• x = 10

• x = 9

• x = + 9

• x = + 10

What are the roots / solutions of the quadratic equation equation 2x² + 3 = 101 ?

• x = + 7

• x = + 8

• x = + 9

• x = + 10

What are the roots / solutions of the quadratic equation x² = 32?

What is another word for zeros?

• y-intercepts

• roots

• vertex

• axis of symmetry

Find the solutions of the equation x² - 16 = 0 by extracting the square root.

• x = 4 and x = -4

• x = 4

• x = -4

• no answer

What are the roots of the quadratic equation (s - 4)² - 81 = 0?

• s = 9/2 and s = -9/2

• s = 9 and s= -9

• s = 2 and s = -2

• s = 13 and s = -13

What are the roots of the quadratic equation 3t² = 12?

• t =4 and t = -4

• t = 2 and t = -2

• t = 3 and t = -3

• t = 9 and t = -9

Which of the following quadratic equations can be solved by extracting square roots?

• x² + 3x – 4 = 0

• x² – 36 = 0

• (x + 1) (x – 3)

• 2x² – 5x – 7 = 0

What appropriate method of solving can we used in the equations that are written in the form x² = c?

• factoring

• quadratic formula

• extracting square roots

• completing the square