Asked by dennyelle
How many x-intercepts does the function f(x) = −2(x−5)2− 3 have?
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Answers
Answered by
oobleck
clearly, none.
The parabola opens downward, and its vertex is at (5,-3)
so it cannot cross the x-axis.
Or, you can express f(x) in standard form and verify that the discriminant is negative. So, no real roots.
The parabola opens downward, and its vertex is at (5,-3)
so it cannot cross the x-axis.
Or, you can express f(x) in standard form and verify that the discriminant is negative. So, no real roots.
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