Solving Quadratic Equations: Quadratic Formula Answers
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Mattie uses the discriminant to determine the number of zeros the quadratic equation 0 = 3x2 – 7x + 4 has. Which best describes the discriminant and the number of zeros?
A
The equation has one zero because the discriminant is 1.B
The equation has one zero because the discriminant is a perfect square.C
The equation has two zeros because the discriminant is greater than 0.D
The equation has no zeros because the discriminant is not a perfect square.2
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A quadratic equation has exactly one real number solution. Which is the value of its discriminant?
A
−1B
0C
1D
23
In simplest radical form, what are the solutions to the quadratic equation 6 = x2 – 10x?Quadratic formula: x =
A
x = 5
B
x = 5
C
x = 5
D
x = 5
4
In simplest radical form, what are the solutions to the quadratic equation 0 = –3x2 – 4x + 5?Quadratic formula: x =
A
x =
B
x =
C
x =
D
x =
5
What is the value of the discriminant of the quadratic equation −1 = 5x2 −2x, and what does its value mean about the number of real number solutions the equation has?
A
The discriminant is equal to −16, which means the equation has no real number solutions.B
The discriminant is equal to −16, which means the equation has two real number solutions.C
The discriminant is equal to 24, which means the equation has no real number solutions.D
The discriminant is equal to 24, which means the equation has two real number solutions.Did you find these answers helpful?
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