SOLUTION: Use the discriminant to determine whether the given quadratic polynomial can be factored, then factor it if it is not prime. Quadratic Polynomial: -8x^2-3x-5.
Question 302081: Use the discriminant to determine whether the given quadratic polynomial can be factored, then factor it if it is not prime. Quadratic Polynomial: -8x^2-3x-5. Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! We want factors of 40 with add up to -3
-8 and 5 make -40
8 and -5 make -40
8 and 5 make 40 but 8+5=13 not -3
It has no real roots.
Using the determinant
b^2-4ac
(-3)^2-4*(-8)*(-5)
9-160
-151
two complex roots
