Question

Выполни умножение: (d−2)(10d+1)(3d−10)

Answer 1

(10d^2-20d+d-2)(3d-10)=30d^3-60d^2+3d^2-6d-100d^2+200d-10d+20=30d^3-157d^2+184d+20

Answer 2

(d-2)(10d+1)(3d-10)
1) (d-2)(10d+1) = 10d^2 + d - 20d -2 = 10d^2 -19d -2 
2) (10d^2 -19d -2)(3d-10)= 30d^3-100d^2 - 57d^2 + 190d -6d + 20 = 30d^3 - 157d^2+184d+20
Ответ: (d-2)(10d+1)(3d-10) = 30d^3 - 157d^2+184d+20