Question

Determinati solutiile intregi ale inecuatiei : 2x^2 - x - 3 <sau= 0

Answer 1

2x^{2} -x-3 \leq 0 \\ 2x^{2} -x-3=0 \\ delta=1+4*2*3=25 \\ \sqrt{delta}=5 \\ x1= (1+5)/2=3 \\ x2=(1-5)/2=-1 \\
  din tabel (untitlet) =>x apartine[-1, 3]