<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <script> var numX = window.prompt("请输入X"); function funX(x){ return 4*Math.pow(x,2)+3*x+2; } console.log(funX(numX)); </script> </body> </html>
