Question

X^3-9x^2-4x+36=0

Determine the values of x for which the function f(x)= x^2-5x-2/ 5x-3

A. is zero

B. is positive, and

C. is negative

Answer 1

B

Explanation:

use the formula x =
`\frac{-b-\sqrt{b^(2)-4ac } }{2a}` and
`x= \frac{-b+\sqrt{b^(2)-4ac } }{2a}`

according to the known condition, a = 1, b = -5-2/5 c = -3

you can input these values into the above two.