Question

58. Graph the function y=x^2+3x-18. How many real roots does the function have?

59. In #58, what value or values of the roots satisfy the function (if any exist)

Answer 1

9514 1404 393

Answer:

58. 2 real roots; see attached for a graph

59. -6, 3

Explanation:

58. A graphing calculator graphs this easily. The graph is shown in the attachment. There are 2 x-intercepts, hence 2 real roots.

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59. The x-intercepts are (-6, 0) and (3, 0), so the x-values x=-6 and x=3 satisfy the equation y = 0.