Question

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

f(x) = -x2 - x + 1

Answer 1

Do you know the quadratic formula?

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

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