{1/4}pangkat 1/2xkuadrat - 4x +3/2 ≤ {1/4}pangkat 2(x kuadrat + 3x-1) tolong banget ya

[tex](\frac{1}{4})^{\frac{1}{2}x^2-4x+\frac{3}{2}}\leq(\frac{1}{4})^{2(x^2+3x-1)} \\ 4^{\frac{1}{2}x^2-4x+\frac{3}{2}}\geq4^{2(x^2+3x-1)} \\ \frac{1}{2}x^2-4x+\frac{3}{2}\geq2(x^2+3x-1) \\ x^2-8x+3\geq 4x^2+12x-4 \\ -3x^2-20x+7\geq 0 \\ 3x^2+20x-7\leq 0 \\ (x+7)(3x-1)\leq 0 \\ -7\leq x\leq \frac{1}{3}[/tex]