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please show me how to solve this

(2x - 5y) power of 2

i am having a problem with the way to step by step please solve this

  • math -

    (2x - 5y)^2
    (2x - 5y)(2x -5y)
    (2x)(2x) + (2x)(-5y) + (-5y)(2x) + (-5y)(-5y)
    4x^2 + (-10xy) + (-10xy) + 25y^2
    4x^2 - 20xy + 25y^2

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