\[\boxed{\text{537\ (537).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ 16 - b^{2} = (4 - b)(4 + b)\]
\[2)\ c^{2} - 49 = (c - 7)(c + 7)\]
\[3)\ 0,04 - a^{2} =\]
\[= (0,2 - a)(0,2 + a)\]
\[4)\ x^{2} - \frac{4}{9} = \left( x - \frac{2}{3} \right)\left( x + \frac{2}{3} \right)\]
\[5)\ 4x^{2} - 25 = (2x - 5)(2x + 5)\]
\[6)\ 81c^{2} - 64d^{2} =\]
\[= (9c - 8d)(9c + 8d)\]
\[7)\ 0,09x^{2} - 0,25y^{2} =\]
\[= (0,3x - 0,5y)(0,3x + 0,5y)\]
\[8)\ a^{2}b^{4} - c^{6}d^{8} =\]
\[= (ab^{2} - c^{3}d^{4})(ab^{2} + c^{3}d^{4})\]
\[9)\ 4a^{2}c^{2} - 9x^{2}y^{2} =\]
\[= (2ac - 3xy)(2ac + 3xy)\]
\[10)\ x^{24} - y^{22} =\]
\[= (x^{12} - y^{11})(x^{12} + y^{11})\]
\[11) - 1600 + a^{12} =\]
\[= a^{12} - 1600 =\]
\[= (a^{6} - 40)(a^{6} + 40)\]
\[12)\ a^{18} - \frac{49}{64} =\]
\[= \left( a^{9} - \frac{7}{8} \right)\left( a^{9} + \frac{7}{8} \right)\]