Solving Quadratic Equations By Using The Quadratic Formula Worksheet With Answers Page 3
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419-5 Solving Quadratic Equations by Using the Quadratic Formula
The solutions are 2.3 and –5.3.
2
5. 10x
− 31x + 15 = 0
SOLUTION:
For this equation, a = 10, b = –31, and c = 15.
The solutions are 2.5 and 0.6.
2
6. 5x
+ 5 = −13x
SOLUTION:
Write the equation in standard form.
For this equation, a = 5, b = 13, and c = 5.
The solutions are –0.5 and –2.1.
Solve each equation. State which method you used.
2
7. 2x
+ 11x − 6 = 0
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Page 3
SOLUTION:
Solve by factoring:
–6, so m + p is positive and mp is negative. Therefore, m and p must have
In this trinomial,
a = 2, b = 11, and c =
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