Question 1

What is the value of the discriminant of $-x^2 +5x+10$?

Accepted Answer

$25-4(-1)(10)=65$

Answer

$25-4(1)(10)=-15$

Answer

$100-4(-1)(5)=120$

Answer

$25x^2-4(-x^2)(10)$

Question 2

A quadratic function has a discriminant of $\Delta = 0$. How many x-intercepts does the parabola have?

Accepted Answer

one

Answer

two

Answer

zero

Answer

not enough information

Question 3

A quadratic function has a discriminant of $\Delta = -1$. How many x-intercepts does the parabola have?

Accepted Answer

zero

Answer

two

Answer

not enough information

Answer

one

Question 4

A quadratic function has a discriminant of $\Delta = \sqrt 5$. How many x-intercepts does the parabola have?

Accepted Answer

two

Answer

zero

Answer

one

Answer

not enough information

Question 5

A quadratic function has a discriminant of $\Delta = 0$. How many x-intercepts does the parabola have?

Accepted Answer

one

Answer

zero

Answer

not enough information

Answer

two

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