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nydimaria [60]
2 years ago
14

When the expression x^2+2x-8 is factored the two roots will equal

Mathematics
1 answer:
Vilka [71]2 years ago
5 0

x^2+2x-8

(x+4) (x-2)

x=-4, x=2

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X+7y=24 and x-9y=-24 doing elimination
nirvana33 [79]
The easy thing to do is eliminate x by subtraction 
 
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5 0
3 years ago
Diagram below shows the curve of a quadratic function
uranmaximum [27]

Answer:

q = -8, k = 2.

r = -6.

Step-by-step explanation:

f(x) = (x - p)^2 + q

This is the vertex form of a quadratic where the vertex is at the point (p, q).

Now the x intercepts are at -6 and 2 and the curve is symmetrical about the line x = p.

The value of p is the midpoint of  -6 and 2 which is (-6+2) / 2 = -2.

So we have:

f(x) = 1/2(x - -2)^2 + q

f(x) = 1/2(x + 2)^2 + q

Now the graph passes through the point (2, 0) , where it intersects the x axis, therefore, substituting x = 2 and f(x) = 0:

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0 = 8 + q

q = -8.

Now convert this to standard form to find k:

f(x) = 1/2(x + 2)^2 - 8

f(x) = 1/2(x^2 + 4x + 4) - 8

f(x) = 1/2x^2 + 2x + 2 - 8

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So k = 2.

The  r  is the y coordinate when x = 0.

so r = 1/2(0+2)^2 - 8

=  -6.

3 0
3 years ago
I not sure what it is? Thank you to who ever help me
Vadim26 [7]
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7 0
2 years ago
The town of Fitzgerald wants to build a coffee house halfway between Oak Station and Pine Station. Where should it be located (l
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Answer:

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=[8+(-6)]/2 , [8+(-7)]/2

=2/2 , 1/2

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4 0
3 years ago
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