3 years ago

Is -0.625 a rational number, why

Mathematics

1 answer:

Brut [27]3 years ago

3 0

Yes because it is a terminating decimal and could be converted as a fraction (:

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Find the least common denominator for these two rational expressions. B/b^2 -64 -7b/b^2+7b-8

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Answer:

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Step-by-step explanation:

We are given expression as

$\frac{b}{b^2-64}-\frac{7b}{b^2+7b-8}$

Firstly, we will factor both denominators

$b^2-64=b^2-8^2=(b-8)(b+8)$

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so, we can plug it back

$\frac{b}{(b-8)(b+8)}-\frac{7b}{(b+8)(b-1)}$

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Second term denominator is

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So,

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So, we get

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