Mathematics

Question

Which expressions are differences of squares?

Select each correct answer.

t^2−1

n^2−225

k^2+81

p^2−40

2 Answer

  • t^2-1 and n^2-225

    I don't think k^2+81 because of the "+" sign, only "-" signs are differences of squares.
  • a²-b² is diffrence of squares

    first one is
    t²-1², yep

    2nd one
    n²-15², yep

    3rd one is not difffernce

    4th one can be forced into p²-(2√10)², but I wouldn't say it is



    first 2
NEWS TODAY