Question

помогите разложить на множители!​

Answer 1

$13)\frac{9}{16}-\frac{1}{144} a^{2}=(\frac{3}{4})^{2}-(\frac{1}{12}a)^{2}=(\frac{3}{4}-\frac{1}{12}a)(\frac{3}{4}+\frac{1}{12}a)\\\\\\14)\frac{25}{64}b^{2}-\frac{1}{81}=(\frac{5}{8}b)^{2}-(\frac{1}{9})^{2}=(\frac{5}{8}b-\frac{1}{9})(\frac{5}{8}b+\frac{1}{9})$

$15)2,56x^{2} -\frac{225}{361}=(1,6x)^{2}-(\frac{15}{19})^{2}=(1,6x-\frac{15}{19})(1,6x+\frac{15}{19})\\\\\\16)\frac{81}{100}-0,04c^{2}=(\frac{9}{10})^{2}-(0,2c)^{2}=(\frac{9}{10}-0,2c)(\frac{9}{10}+0,2c)$