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krek1111 [17]
3 years ago
8

Which expression is equivalent to (x +9i)2?

Mathematics
1 answer:
Debora [2.8K]3 years ago
6 0
B x^2+18xi-81 hope this helps
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Find the x-intercepts of the parabola with
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Answer:

x-intercepts are (0, 0) and (-6, 0)

Step-by-step explanation:

equation of a parabola in vertex form:  y = a(x - h)² + k

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Substituting the given vertex (-3, -18) into the equation:

y = a(x + 3)² - 18

If the y-intercept is (0, 0) then substitute x=0 and y=0 into the equation and solve for a:

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Therefore, y = 2(x + 3)² - 18

To find the x-intercepts, set the equation to 0 and solve for x:

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and  x = -3 - 3 = -6

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2 years ago
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