# Factoring Binomials - Difference of Squares

Objective: I can factor binomials that are difference of squares.

A difference of squares is a binomial of the form:

a2b2

Take note that the first term and the last term are both perfect squares.

When we factor a difference of two squares, we will get

a2b2 = (a + b)(a – b)

This is because (a + b)(a – b) = a2ab + ab – b2 = a2b2

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Factor the following.
Enter each answer in the format (x+1)(x-1), with no spaces.

x2 – 25 =

x2 – 9 =

x2 – 81 =

x2 – 100 =

x2 – 49 =

9x2 – 16 =

4x2 – 9 =

x2 – 36 =

49x2 – 64 =

x2 – 1 =

25x2 – 1 =

x2 – 121 =

25x2 – 9 =

64x2 – 9 =

x2 – 4=

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