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Annette [7]
3 years ago
14

X^3 + 8 = (x+2)(____) What do I have to multiply by (x+2) to get x^3 + 8

Mathematics
1 answer:
sasho [114]3 years ago
7 0
                  x² -  2x + 4
x + 2|x³ + 0x² + 0x + 8
        x³ + 2x²
               -2x² + 0x
               -2x² -  4x
                          4x + 8
                          4x + 8
                                  0

x³ + 8 = (x + 2)(x² - 2x + 4)
x³ + 8 = (x + 2)(x - 2)(x - 2)
x³ + 8 = (x + 2)(x - 2)²
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Answer:

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Step-by-step explanation:

Okay, so do it like this:

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Now it's 14 + 5

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Your answer is 2(7) + 5 = 19

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Answer:

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The time given is 5pm to catch the train back to school;

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So;

Total time  = 2hr 35min

So;

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