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Ray Of Light [21]
2 years ago
14

Use f(x) = x^2 + 4x - 12

Mathematics
1 answer:
Mashutka [201]2 years ago
8 0

Answer:

I imagine you aren't using calculus, so:

A: the leading term is 1>0, so it opens upwards.

B. First coordinate of the vertex is -\frac b{2a}=-\frac42=-2, the second coordinate we'll find by replacing the value: f(-2)=(-2)^2+4(-2)-12 = 4-8-12=-16

C. Quadratic formula or if you stare at the equation long enough you can rewrite the equation as  f(x) = (x+6)\times(x-2). At this point the x intercepts are the zeroes of the function, or -6 and 2.

D. The y-intercept is the value of the function at 0, or the constant term: -12

E. The graph has a minimum since the curve opens upwards.

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Answer:

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Adding fractions by taking LCD.

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