0} \atop {(3x-4)/(2x+6)\leq0}} \right" alt="\left \{ {{2x^{2}+5x-7>0} \atop {(3x-4)/(2x+6)\leq0}} \right" align="absmiddle" class="latex-formula">
2x² + 5x - 7 =0
D = 25 + 56 = 81; √D = 9
x₁ = (-5+9)/4 = 1
x₂ = (-5-9)/4 = -14/4 = -3,5
3x-4=0
2x+6≠0
x= 
x≠-3
(-∞; -3,5) U (1; 4/3]