Question

Выполни умножение: (z−5)(12z+1)(4z−12)

Answer 1

$(z-5)(12z+1)(4z-12)= (12z^2 +z - 60z -5)\cdot 3(z-3)=\\ =4(12z^2 - 59z -5)(z-3) = 4(12z^3 - 59z^2 -5z -36z^2 +178z +15)=\\ = 4(12z^3 - 95z^2 +173z+15) = 48z^3 -380z^2 +692z+60$