Question

How to find the x and y-intercept given `f(x)= 9x^2-2x-4`?

Answer 1

To find y-inercept, make x = 0 -> y = -4

To find x-intercepts, make y = 0:

Solve quadratic equation: `9x^2 - 2x - 4 = 0`

`D = d^2 = 4 + 144 = 148 -> d = +-2sqr37`

Two x-intercepts: `x = 4/18 + (2sqr37)/18.`

`and x = 4/18 - (2sqr37)/18`