Question

9. Use the discriminant to find the number of real solutions of the following quadratic equation: 9x2 + 6x + 1= 0.

A. no real solutions

B. 1 real solution

C. 2 real solutions

D. 3 real solutions

Answer 1

the discriminant is

\[\Delta = b^2 - 4ac\]

in your question a = 9, b = 6 and c = 1

the conditions

Discriminant > 0, 2 unequal roots, if its a perfect square such as 4, 16, 25, the roots are rational

Discriminant = 0, 2 equal roots sometimes called 1 root

Disriminant < 0 no real roots,

hope this helps.

Answer 2

what would the answer be? @campbell_st

Answer 3

what value did you get for the discriminant when you substituted..?

Answer 4

could i just have the answer please im short on time and this is my last question

Answer 5

@campbell_st