Solving Quadratic Equations By Using The Quadratic Formula Worksheet With Answers Page 19
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419-5 Solving Quadratic Equations by Using the Quadratic Formula
The solutions are 5.2 and –1.2.
2
30. 3x
− 24x = −36
SOLUTION:
Solve by using the quadratic formula.
Write the equation in standard form.
For this equation, a = 3, b = –24, and c = 36.
Use the Quadratic Formula.
The solutions are 6 and 2.
2
31. x
− 3x = 10
SOLUTION:
Solve by factoring.
Write the equation in standard form.
Factor.
The solutions are 5 and –2.
2
32. 4x
+ 100 = 0
SOLUTION:
Solve using the quadratic formula.
First, check the value of the discriminant.
For this equation, a = 4, b = 0, and c = 100.
The discriminant is negative, so the equation has no real solutions, ø.
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Page 19
2
33. x
= −7x − 5
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