Objective: I can solve trinomials using the quadratic formula.

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.

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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