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22 September, 12:23

Which expression is equal to 4√20-3√45? - 11√5, √5, 11√5, √-5

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  1. 22 September, 16:00
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    4√20 - 3√45

    4√ (4 * 5) - 3√ (9 * 5)

    8√5 - 9√5

    -√5

    It seems this is not one of your answer choices, but having checked it twice, I am sure it is the answer. Did you mistype your question or one of your answers?
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