А) 36х²-49=(6х)²-7²=(6х-7)(6х+7)
б) -5t²-10tq-5q²= -5(t²+2tq+q²) = -5(t+q)² = -5(t+q)(t+q)
в) 36z²-(z+2)² = (6z)² - (z+2)² = (6z-(z+2))(6z+(z+2)) = (5z+2)(7z+2)
г) х⁴-81у⁴ = (х²)²-(9у²)² = (х²-9у²)(х²+9у²) = (х-3у)(х+3у)(х²+9у²)
д) 100а²-60ас+9с² = (10а-3с)² = (10а-3с)(10а-3с)