Question

Помогите сократить дробь :(2c-6d)² /c-3d

Answer 1

выносим 2, получаем
2(с-3d)2/c-3d
сокращаем на с-3d, получаем
2(c-3d) = 2c-6d

Answer 2

$frac{(2c-6d) ^{2} }{c-3d} = frac{4c ^{2}+36d ^{2} -24d}{c-3d} = frac{4(c^{2} +9d ^{2} -6d)}{c-3d} = frac{4(c-3d) ^{2} }{c-3d} =4(c-3d)= \ =4c-12d$