\[\boxed{\text{995.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[\textbf{а)}\ 1 - a^{2}b^{2} = (1 - ab)(1 + ab)\]
\[\textbf{б)}\ 4x^{2}y^{4} - 9 =\]
\[= (2xy^{2} - 3)(2xy^{2} + 3)\]
\[\textbf{в)}\ 0,09x^{6} - 0,49y^{2} =\]
\[= (0,3x^{3} - 0,7y)(0,3x^{3} + 0,7y)\]
\[\textbf{г)}\ 1,21a² - 0,36b^{6} =\]
\[= (1,1a - 0,6b^{3})(1,1a + 0,6b^{3})\]
\[\textbf{д)}\ 1\frac{7}{9}x² - \frac{9}{16}y^{2} = \frac{16}{9}x^{2} -\]
\[- \frac{9}{16}y^{2} =\]
\[= \left( \frac{4}{3}x - \frac{3}{4}y \right)\left( \frac{4}{3}x + \frac{3}{4}y \right)\]
\[\textbf{е)}\ 0,01a²b^{4} - 1 =\]
\[= (0,1ab^{2} - 1)(0,1ab^{2} + 1)\ \]