Найти область определения функции у =√5-х² -4х /√х +4
{5-x²-4x≥0 {x+4>0 x+4>0⇒x>-4 x²+4x-5≤0 x1+x2=-4 u x1*x2=-5 x1=-5 U x2=1 + _ + --------------[-5]-----(-4)-----------[1]-------------- \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ x∈(-4;1]