# The Quadratic Formula / Quiz

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question
Which equation can be solved using the expression for x? 10x2 = 3x + 2 2 = 3x + 10x2 3x = 10x2 - 2 10x2 + 2 = -3x
B
question
Using the quadratic formula to solve 7x2 - x = 7, what are the values of x?
B
question
In the derivation of the quadratic formula by completing the square, the equation is created by forming a perfect square trinomial.What is the result of applying the square root property of equality to this equation?
B
question
Which equation shows the quadratic formula used correctly to solve 7x2 = 9 + x for x?
D
question
If the discriminant of a quadratic equation is equal to , which statement describes the roots? There are two complex roots. There are two real roots. There is one real root. There is one complex root.
A
question
If x = -3 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the equation? The discriminant is negative. The discriminant is -3. The discriminant is 0. The discriminant is positive.
C
question
Which equation could generate the curve in the graph below? y = -2x2 + 3x - 5 y = -2x2 - 4x - 2 y = -2x2 - 16x- 28 y = -2x2 +16x -28
C
question
If is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the equation? The discriminant is 0. The discriminant is 6. The discriminant is positive. The discriminant is negative.
A
question
Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?
D
question
Which equation shows the quadratic formula used correctly to solve 5x2 + 3x - 4 = 0 for x?
A
question
Which equation has the solutions ? 2x2 + 6x + 9 = 0 x2 + 3x + 12 = 0 x2 + 3x + 3 = 0 2x2 + 6x + 3 = 0