The Quadratic Formula QUIZ

What is the discriminant of 9x2 + 2 = 10x?

28

Find the discriminant of 3x^2-10x=-2

76

What is the discriminant of 3x^2-10x=-2?

76

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

Which equation can be solved using the expression for x? 10x2 = 3x + 2 2 = 3x + 10x2 3x = 10x2 - 2 10x2 + 2 = -3x

B

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

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

If x=6 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.

Using the quadratic formula to solve x2 = 5 - x, what are the values of x?

x = [ -1 ± √21 ] / 2

Which equation could generate the curve in the graph below? y = 3x2 - 2x + 1 y = 3x2 - 6x + 3 y = 3x2 - 7x + 1 y = 3x2 - 4x - 2

y = 3x^2 -2x+1.