Chrome，
QQ浏览器
.
![[初三数学04]二次函数与一元二次方程（不等式）](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F68cca5e1665f76f8c37bae31d10dcaf1dda8af56.jpg%40672w_378h_1c_%21web-search-common-cover)
![全91集【2025新教材 北师大版数学七年级上册/下册]2025新教材北师大版数学，七年级数学上下册数学视频课本同步精讲(同步练习题)](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F9776f7ba807a36d5c0eeb09adbb3e9ab1d242846.jpg%40672w_378h_1c_%21web-search-common-cover)
.