Scrieti o inecuatie care are multimea solutiilor [-1;4]

Răspuns :

a(x-x1)(x-x2)
a=1=>(x+1)(x+4)
=|(x+1)(x-4)|
Succes !
x-2≤3x≤2x+4
{x-2≤3x  -2≤3x-x=>-2≤2x  =>-1≤x
{3x≤2x+4=>3x-2x≤4  =.>x≤4
x∈[-1;4]