GRE考试

【单选题】



网考网参考答案：C
网考网解析：
This one is easier than it looks. Don’t try to factor. Don’t solve. Just add 2x to both sides of the given equation to get that x 2 -7 = x. The columns are equal (C). document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>