Solve Quadratic Equations Review

Solve by factoring: x² + 3x - 18 = 0

• x = -3 and x = 6
• x = 3 and x = -6
• x = -9 and x = 2
• x = 9 and x = -2

Solve by taking square roots:

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no real solution

What should you do first to solve this equation using quadratic formula?

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.

What number goes in the blank to complete the square for this trinomial?

x² – 8x + ___

• -4

• -16

• 4

• 16

Use the quadratic formula to find the solutions for

y = -x² - 5x + 12

• No Real Solution

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Solve using square roots:

10x² + 3 = -17

• x = 6.7 or x = -6.7

• x = 2.25 or x = -2.25

• x = -2 or x = 2

• No real solution

Solve using the Zero-Product Property.

7x(x − 6) = 0

• x =7 and x = −6

• x = 0 and x = 6

• x = 0 and x = −6

• x = 7 and x = 6