Помогите!!!

номер 11,12,13

Ответы:

$left { { {{ x^{3}+5 x^{2}-5-x&gt,0 } atop { x^{3}-4 x^{2} -4-x&gt,0 }} right. left { {{ x^{2}(x+5)-(x+5)&gt,0 } atop {x^{2}(x-4)+(x-4)&gt,0 } right. left { {{( x^{2} -1)(X+5)&gt,0} atop {( x^{2} +1)(X-4)&gt,0}} right.X&gt,1,X&gt,-1, X&gt,-5,X&gt,4, =&gt,X&gt,4$