\[\boxed{\text{909.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[\textbf{а)}\ 64 - y^{4} = (8 - y^{2})(8 + y^{2})\]
\[\textbf{б)}\ x² - c^{6} = (x - c^{3})(x + c^{3})\]
\[\textbf{в)}\ a^{4} - b^{8} = (a^{2} - b^{4})(a^{2} + b^{4})\]
\[\textbf{г)}\ 25m^{6} - n^{2} = (5m^{3} - n)(5m^{3} + n)\]
\[\textbf{д)}\ 1 - 49p^{10} = (1 - 7p^{5})(1 + 7p^{5})\]
\[\textbf{е)}\ 4y^{6} - 9a^{4} = (2y^{3} - 3a^{2})(2y^{3} + 3a^{2})\]
\[\textbf{ж)}\ 64 - a^{4}b^{4} = (8 - a^{2}b^{2})(8 + a^{2}b^{2})\]
\[\textbf{з)}\ 16b^{2}c^{12} - 0,25 = (4bc^{6} - 0,5)(4bc^{6} + 0,5)\]
\[\textbf{и)}\ 81x^{6}y² - 0,36a^{2} = (9x^{3}y - 0,6a)(9x^{3}y + 0,6a)\ \]