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I am having a hard time solving my problem

2ã20 + 5 ã 80 - 7 ã5

Can someone please help me

  • algebra - ,

    Is your ã symbol supposed to represent the square root of what follows?

    If so, use the fact that
    sqrt 20 = 2 sqrt 5, and
    sqrt 80 = 4 sqrt 5.

    Then collect terms. All will contain a sqrt 5 factor.

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