jayda Group Title Evaluate the discriminant of 25x2 + 350x + 49 = 0. Tell how many solutions the equation has and whether the solutions are real or imaginary. A. one real solution B. two imaginary solutions C. two real solutions D. cannot be determined one year ago one year ago

1. NotTim Group Title

wat u think first

2. jayda Group Title

i honestly dont have a clue! ha

3. NotTim Group Title

oh shoot i forgot too. wats discriminant

4. jayda Group Title

i really dont know

5. binarymimic Group Title

$x = \frac{ -b \pm \sqrt{b^{2} - 4ac} }{ 2a }$ the discriminant is $\sqrt{b^{2} - 4ac}$ because it can be used to discriminate between solutions.

6. NotTim Group Title

oh. that's relatively simple then. Here's a hint: ax^2-bx-c=0 (minus sign is just there; it doesn't matter). works in conjunction with binarymimic's comment.

7. AccessDenied Group Title

The discriminant is actually a bit simpler, it's the radicand of that expression: $$b^2 - 4ac$$ It is useful because the sign on it tells us whether there is a positive number or negative number under the radical. In the case of a positive, we have two real roots. In the case of a negative, we have two imaginary / complex roots. If we have 0, then we have a single root that is repeated. ((-b +- 0) / (2a))

8. ParthKohli Group Title

Actually, the discriminant is just $$b^2 - 4ac$$.