SOLUTION: Im having trouble with the following question. Use the discriminant to determine whether the given quadratic polynomial can be factored, then factor it if it is not prime. Match

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Im having trouble with the following question. Use the discriminant to determine whether the given quadratic polynomial can be factored, then factor it if it is not prime. Match      Log On


   



Question 154786: Im having trouble with the following question.
Use the discriminant to determine whether the given quadratic polynomial can be factored, then factor it if it is not prime. Match your result to the correct answer below.
–8x2 – 3x – 5
1)(–8x – 5)(x – 3)
2)(x – 3)(x – 5)
3)(–8x – 3)(x – 5)
4)The expression is prime.

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
–8x^2–3x–5
USING THE QUADRATIC EQUATION WE GET COMPLEX ROOTS = ANSWER 4).
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(3+-sqrt[-3^2-4*-8*-5])/2*-8
x=(3+-sqrt[9-160])/-16
x=(3+-sqrt-151)/-16
x=(3+-12.29i)/-16
x=3/-16+-12.29i/-16
x=-0.1875+-0.768i