\[\boxed{\text{871.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[\textbf{а)}\ (y - 4)(y + 4) = y² - 16\]
\[\textbf{б)}\ (p - 7)(p + 7) = p² - 49\]
\[\textbf{в)}\ (4 + 5y)(5y - 4) = 25y² - 16\]
\[\textbf{г)}\ (7x - 2)(7x + 2) = 49x² - 4\]
\[\textbf{д)}\ (8b + 5a)(5a - 8b) = 25a² - 64b²\]
\[\textbf{е)}\ (10x - 6c)(10x + 6c) = 100x² - 36c²\ \]