Find the difference of squares: (a - b)(a + b) = (a^2 - b^2)

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Examples

Lessons

Find the difference of squares
1. $(3x + 4y)(3x - 4y)$
2. $(-x^2-3y^2)(-x^2+3y^2)$
3. $x^2 - 25$
4. $16 - 25x^4$
5. $16x^2y^8 - 4$
6. $x^{2n} - 25$
7. $x^8 - 1$
8. $(x^2 + 6x + 9) - 4y^2$

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