化简:(x2+3)2-(x2-3)2的值是()A.4xB.5xC.6xD.8x-数学

题目简介

化简:(x2+3)2-(x2-3)2的值是()A.4xB.5xC.6xD.8x-数学

题目详情

化简:(
x
2
+3)2-(
x
2
-3)2
的值是(  )
A.4xB.5xC.6xD.8x
题型:单选题难度:偏易来源:不详

答案

(class="stub"x
2
+3)2-(class="stub"x
2
-3)2
=(class="stub"x
2
+3+class="stub"x
2
-3)(class="stub"x
2
+3-class="stub"x
2
+3)=6x.
故选C.

更多内容推荐