# Solve by Quadratic Formula

Objective: I can solve trinomials using the quadratic formula.

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Given the trinomial or quadratic equation ax2 + bx + c, we can find the values of x by using the quadratic formula:

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Solve the following equations using the quadratic formula.
Give your answer correct to the hundredths place.

5x2– 4x – 2 = 0
x =

2x2 + 7x + 2 = 0
x =

3x2 + 8x + 2 = 0
x =

7x2– 28x + 15 = 0
x =

5x2 + 12x + 3 = 0
x =

2x2 + 3x – 4 = 0
x =

5x2 + 30x – 18 = 0
x =

x2– 16x – 10 = 0
x =

x2– 2x – 5 = 0
x =

5x2– 8x – 30 = 0
x =

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