Solving for X with Squares and Square Roots

• 9

• -9

• 40.5

• -40.5

Write an equation for the phrase "Two cubed is equal to the square root of x".

Solve the following quadratic equation by completing the square: x^2 - 6x + 9 = 0

• x = -3

• x = 9

• x = 3

• x = 6

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form

• Write down: a=1, b=6, c=-13

• Make it equal 0 by subtracting 3 on each side

• Type it all in a calculator.

• x = 12
• x = 24
• x = 144
• x = 121

y² = 144

• 14

• 12

• -12

• -12 and 12

Which number has a square root that is between 5 and 6?

• 48

• 81

• 28

• 36

• 20

What is the square root of 49?

• 6

• 7

• 8

• 9

Solve using square roots.

• ±√9

• ±3

• ±1

• No real solution

2x²=100

• x = √25

• x = ±5√2

• x = √100

• x = ±√5