Which equation can be solved using the expression for x?
10x2 = 3x + 2
2 = 3x + 10x2
3x = 10x2 - 2
10x2 + 2 = -3x
answer
B
question
Using the quadratic formula to solve 7x2 - x = 7, what are the values of x?
answer
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?
answer
B
question
Which equation shows the quadratic formula used correctly to solve 7x2 = 9 + x for x?
answer
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.
answer
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.
answer
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
answer
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.
answer
A
question
Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?
answer
D
question
Which equation shows the quadratic formula used correctly to solve 5x2 + 3x - 4 = 0 for x?
