Algebra

Difference of Squares

Why a²-b² = (a+b)(a-b)

  • High school
  • about 3 min
  • 2 of 7 in the family
Not started
a² = 25b²a−b = 3a = 5

Pink area (b²) is removed - remainder is (a+b)·(a−b)

Values

General

a2−b2=(a+b)(a−b)a^2 - b^2 = (a+b)(a-b)

Your values

52−22=(5+2)(5−2)=215^2 - 2^2 = (5+2)(5-2) = 21