不等式img class=kfformula src=zzximg/20190808/1565250723184457.png data-latex={x}^{2}-2x-80/的解集是( )
①
img class=kfformula src=zzximg/20190808/1565250723744347.png data-latex=\left ( {-2,4} \right )/
②
img class=kfformula src=zzximg/20190808/1565250723532354.png data-latex=\left ( {-\infty ,-2} \right )/
③
img class=kfformula src=zzximg/20190808/1565250723616994.png data-latex=\left ( {-\infty ,-2} \right )\cup \left ( {4,+\infty } \right )/
④
img class=kfformula src=zzximg/20190808/1565250723229267.png data-latex=\left ( {4,+\infty } \right )/