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11 January, 13:50

Find the difference: square root20 - square root80

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  1. 11 January, 13:57
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    -2√ (5)

    Step-by-step explanation:

    √ (20) = √ (4*5) = √ (4) * √ (5) = 2*√ (5) = 2√ (5)

    √ (80) = √ (16*5) = √ (16) * √ (5) = 4*√ (5) = 4√ (5)

    therefore : √ (20) - √ (80) = 2√ (5) - 4√ (5) = (2 - 4) * √ (5) = - 2√ (5)
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