0" class="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Ctimes%20%7B%3F%7D%5E%7B4%7D%20%2B%20%5Ctimes%20%7B%7D%5E%7B3%7D%20%2B%203%7D%7B%20-%20%5Ctimes%20%7B%20%7D%5E%7B2%7D%20%2B%20%5Ctimes%20%2B%202%7D%20%3E%200" title=" \frac{ \times {?}^{4} + \times {}^{3} + 3}{ - \times { }^{2} + \times + 2} > 0">