\[\boxed{\text{824.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[\textbf{а)}\ ( - 9a + 4b)^{2} = 81a² -\]
\[- 72ab + 16b²\]
\[\textbf{б)}\ ( - 11x - 7y)^{2} = 121x² +\]
\[+ 154xy + 49y²\]
\[\textbf{в)}\ ( - 0,8x - 0,5b)^{2} = 0,64x² +\]
\[+ 0,8xb + 0,25b²\]
\[\textbf{г)}\ \left( - 1\frac{1}{3}p + 6q \right)^{2} =\]
\[= \left( 6q - \frac{4}{3}p \right)^{2} = 36q^{2} -\]
\[- 16qp + 1\frac{7}{9}p²\]
\[\textbf{д)}\ (0,08a - 50b)^{2} = 0,0064a² -\]
\[- 8ab + 2500b²\]
\[\textbf{е)}\ ( - 0,5x - 60y)^{2} = 0,25x² +\]
\[+ 60xy + 3600y²\]