Find the zeroes of the function by using the quadratic formula.

f(x) = -x2 - x + 1

Question

Find the zeroes of the function by using the quadratic formula. 

f(x) = -x2 - x + 1

ash2326 · Answer

Do you know the quadratic formula?

anonymous · Answer

@ash2326 yeah its x = -b ± √(b2 - 4ac)
               2a    \

ash2326 · Answer

Good, so do you know a, b , c here >

anonymous · Answer

a = -1, b = -1, c = 1 @ash2326

ash2326 · Answer

Now plugin these in your formula, and you'll get two  values for x, which are the solution
$$\Large x=-\frac{-b\pm \sqrt {b^2-4ac}}{2a}$$

precal · Answer

you can verify your solutions by using the discriminant.  Also, you can look at the graph of the function and see how many times the function has crosses the x axis, those locations are your solutions