Question

Use the graph of the quadratic function y = -1/2 x^2 + x + 4 to answer the question.


What are the zeros of the function?

–2 and 4
4 and 0
4 and –4
–8 and –4

Answer 1

Solve -1/2 x^2 + x + 4 = 0. Multiply by -2: x^2 - 2x - 8 = 0, which factors as (x - 4)(x + 2) = 0.

Zeros: x = 4 and x = -2.