3 years ago

Find the difference: square root of 20 - square root of 80

Mathematics

2 answers:

Mamont248 [21]3 years ago

8 0

Answer:

$-2\sqrt{5}$

Step-by-step explanation:

$\sqrt{20} = \sqrt{10*2} = \sqrt{5 * 2 *2} = \sqrt{2^2 * 5} = 2\sqrt{5} \\\\\sqrt{80} = \sqrt{20*4} = \sqrt{5*4 *4} = \sqrt{4^2 * 5} = 4\sqrt{5} \\\\2\sqrt{5} - 4\sqrt{5} = -2\sqrt{5}$

Volgvan3 years ago

5 0

Answer:

Step-by-step explanation:

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