What is #sqrt5 * sqrt70#?

1 Answer
SCooke
Apr 26, 2018

#18.71#

Explanation:

You can just use a calculator or slide rule, calculating the individual square roots first, and then multiplying them, or you could use a logarithm table, converting them to the logarithms, adding them and then converting them back again.

You can also multiply the factors together and then take the square root (that essentially what the logarithm method is doing).

#sqrt(5)xxsqrt(70) = sqrt((5xx70)) = sqrt(350) = 18.71#

#sqrt(5) xx sqrt(70) = 2.236 xx 8.367 = 18.71#

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