Question

Use the discriminant to determine how many x-intercepts the graph of the equation has.

y = – 4x2 + 4x – 1

A.
zero

B.
one

C.
two

D.
three

Answer 1

@Hero plz help

Answer 2

The discriminant is \(b^2 - 4ac\)

If the discriminant is negative, then there are zero solutions
If the discriminant is zero, then there is exactly one solution
If the discriminant is positive, then there are two solutions

Answer 3

These are the only possibilities, therefore, you can automatically eliminate D as an answer choice.

Answer 4

Ok so A right?

Answer 5

The correct answer is A.

Use the discriminant; a = –4, b = 3, and c = –2.

Answer 6

Yes, you are correct.