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polet [3.4K]
3 years ago
7

Can someone help me with factoring by grouping x^3 + x^2 - 25x - 25 please show work

Mathematics
1 answer:
BaLLatris [955]3 years ago
7 0
<span><span>(x+1)</span><span>(x+5)</span></span><span>(x−5<span>)...is the answer
</span></span>Factor <span><span><span><span>x3</span>+<span>x2</span></span>−<span>25x</span></span>−25</span><span><span><span><span>x3</span>+<span>x2</span></span>−<span>25x</span></span>−25</span><span>=<span><span><span>(<span>x+1</span>)</span><span>(<span>x+5</span>)</span></span><span>(<span>x−5</span><span>)</span></span></span></span>
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Answer:

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Step-by-step explanation:

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In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

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t = \frac{8.2 - 7.8}{\frac{0.6}{\sqrt{16}}}

t = 2.67

The value of the test statistic is t = 2.67

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