- $\rhd$ Difference of two squares (3:23) Factor:
- [Example 1] $9x^2-49$
- [Example 2] $36y^4-100$
- $\rhd$ Difference of two squares (1:49) Factor:
- [Example 1] $16x^2-25y^2$
- [Example 2] $64x^2-81y^2$
- $\rhd$ Difference of two squares (3:01) Factor:
- [Example 1] $(x-3)^2-4$
- [Example 2] $(x+7)^2-25$
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