(сtg п/6) 4x-12<1/3 x2-x

Question

(сtg п/6) 4x-12<1/3 x2-x

Answer 1

1/2*4x-12<1/3*x²-x<br>2x-12<1/3x²-x<br>x²-3x-6x+36>0
x²-9x+36>0
D=81-144=-63<0<br>x∈(-∞;∞)