Unit 2 - Lesson 10
Factoring a
Difference of
Squares
Difference of Squares
➔ a2 - b 2
◆ a2 and b2 are perfect squares
◆ Difference = subtracting
➔ a2 - b2 = (a + b)(a - b)
Difference of Squares
Ex: k2 - 1
Ex: 144 - x2
Difference of Squares
Ex: 20t3 - 80t
Ex: 125n2 + 5n4
Difference of Squares
Ex: 4x2 - 81y2
Ex: -z6 + 49