Anonymous asked in Education & ReferenceTeaching · 1 decade ago


2 Answers

  • 1 decade ago
    Favorite Answer

    It's a difference of two squares:

    (A + B)(A - B) = A^2 - B^2

    Therefore, (y-4/5)(y+4/5) = y^2 - 16/25

  • 1 decade ago

    Use the FOIL method to solve this First number times first number or Y times Y which is Y squared. Outer number times outer number. inner number times inner number. last number time last number. then combine like terms.

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