Verified answer

Объяснение:

[tex](4x-4)(1+x)(5-x)\geq 0\\4*(x-1)*(x+1)*(-(x-5))\geq 0\\-4*(x-1)*(x+1)*(x-5)\geq 0\ |:(-4)\\(x-1)*(x+1)*(x-5)\leq 0.[/tex]

-∞__-__-1__+__1__-__5__+__+∞          ⇒

Ответ: x∈(-∞;-1]U[1;5].