<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>数学方程式</title>
	</head>
	<body>
		<h3 style="color: red;text-align: center;font-size: 24px;">数学方程式</h3>
		<hr width="80%" size="2" color="blue"/>
		<p align="center">2x<sup>2</sup>+3x=9</p>
		<p align="center">x<sub>1</sub>+x<sub>2</sub>=10</p>
	</body>
</html>

　　

chapter3_t2_IT