Х(х-1)-(3+х)х=4 Помогите

Question

Х(х-1)-(3+х)х=4
Помогите

Answer 1

Х(х-1)-(3+х)х=4
х(х -1 - 3 - х) = 4
х(-4) = 4
-4х = 4
х = - 1