1. anonymous

$f(0)=0^2-9\times0+7=7$ which is the y intercept.$f(x)=0=x^2-9x+7=>x=(9\pm \sqrt{53})/2$Which are the x intercepts.

2. anonymous

the answer is x-intercept is (8.1,0.9) y-intercept is (0,7) how did they get these answers

3. anonymous

The x intercepts occur when y=0 (or, if you like, f(x)=0) so you just put this into you equation (remember, this is a quadratic function this will have two solutions and the function will therefore have two x intercepts). Similarly, the y intercept occurs when x=0, so you put this into your equation.

4. anonymous

?

5. anonymous

i know how to do y-intercepts but not x

6. anonymous

X intercepts occur when f(x)=0, so make your equation equal to zero and solve.

7. anonymous

plz show me how

8. anonymous

Do you know how to solve a quadratic equation?

9. anonymous

no

10. anonymous
11. anonymous

i just found a great website that did it for me ty

12. anonymous

Good :)