find the x intercept of f(x)=x2-9x+7
What are the x-intercepts of f(x)=x2−9x+7
1 Expert Answer
1. At the x intercepts, y=0, so set this equal to 0
2. To solve equations like this, factor if possible. (If not, consider completing the square, or the quadratic formula)
- This does NOT factor, so I'll use the quadratic formula (hopefully you know this, x=-b plus/minus....)
- x =[ 9+/- sqrt (81-28)]/2
- x=[ 9+/- sqrt (53)]/2
The answers aren't pretty, but those are your values. If you need to graph those, use a calculator to get approximately 0.86 and 8.14
Still looking for help? Get the right answer, fast.
Find an Online Tutor Now
Choose an expert and meet online.
No packages or subscriptions, pay only for the time you need.