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4 years ago

Simplify as far as possible without a calculator. (7+2√2)(7−2√2)

Mathematics

1 answer:

bogdanovich [222]4 years ago

5 0

Answer:

Step-by-step explanation:

Given

(7 + 2 $\sqrt{2}$ )(7 - 2 $\sqrt{2}$ ) ← expand factors using FOIL

= 7² - 2 $\sqrt{2}$ + 2 $\sqrt{2}$ - (2 $\sqrt{2}$ )² ← collect like terms

= 49 - 8

= 41

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gregori [183]

Answer:

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Step-by-step explanation:

we know that

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$V=\frac{4}{3}\pi r^{3}$

In this problem we have

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substitute

$V=\frac{4}{3}\pi (8^{3})=\frac{2,048}{3}\pi\ in^{3}$

convert to mixed number

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Pavel [41]

Answer:

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Answer:

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Step-by-step explanation:

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