6. \( 121 \mathrm{a}^{6}-144 \mathrm{~b}^{\mathrm{a}} \) 7. \( \mathrm{x}^{3}-27 \) 8. \( 8 \mathrm{y}^{3}+125 \) 9. \( 216 \mathrm{a}^{9}-343 \mathrm{~b}^{6} \) 10. \( \mathrm{x}^{2}-10 \mathrm{x}+25 \) 11. \( 36 \mathrm{y}^{2}+60 \mathrm{y}+25 \) 12. \( 81 \mathrm{a}^{4}-108 \mathrm{a}^{2} \mathrm{~b}+36 \mathrm{~b}^{2} \) 13. \( \mathrm{x}^{2}+9 \mathrm{x}+20 \) 14. \( \mathrm{x}^{2}-3 \mathrm{x}-40 \) 15. \( \mathrm{x}^{2}-15 \mathrm{x}+56 \) 16. \( 3 \mathrm{x}^{2}+10 \mathrm{x}+7 \) 17. \( 5 \mathrm{x}^{2}-17 \mathrm{x}+6 \) 18. \( 18 \mathrm{x}^{2}-33 \mathrm{x}+14 \)
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The expression \( 121 a^6 - 144 b^2 \) can be factored using the difference of squares: \( (11 a^3 - 12 b)(11 a^3 + 12 b) \). This technique is great for recognizing patterns in polynomial equations and can help streamline problem-solving in algebra. When dealing with \( x^3 - 27 \), it's helpful to know that it represents a difference of cubes. This can be factored as \( (x - 3)(x^2 + 3x + 9) \). Understanding the special factorizations like difference of cubes can make polynomial expressions much easier to navigate and simplify!