Problems Solving with Quadratic Equations

Find the solution(s) to the quadratic equation: 3x^2-243=0

• -9

• 9

• 3

• -3

Solve using square roots

• √3

• ±√3

• -3

• No real solution

• x = 9 or x = -9

• no solutions

• x = 2 or x = -2

• x = 81 or x = -81

In solving quadratic equation, if the linear term is missing what is the best method to use?

• extracting square root

• factoring

• completing the square

• quadratic fromula

Solve using the square root method: (x+2)² - 6= 30

• (6,0) (-6,0)

• (34,0) (-34,0)

• (9.47,0) (-1.47)

• (4,0) (-8,0)

• No real solutions

• Factoring

• Isolating the variable and taking a square root

Solve using the Square Root Method -5x² = -50

• ± 5

• ± 10

• ± √10

• -10

• 5

Solve using the quadratic formula:

15x² + 22x = −8

• x = −2/3, 4/5

• x = 2/3, −4/5

• x = 2/3, 4/5

• x = −2/3, −4/5