[﹙√a-√b﹚的平方+4√ab]÷﹙√a+√b﹚

1个回答

[﹙√a-√b﹚的平方+4√ab]÷﹙√a+√b﹚
=[﹙a-2√ab+b﹚+4√ab]÷﹙√a+√b﹚
=[﹙a+2√ab+b﹚]÷﹙√a+√b﹚
=﹙√a+√b﹚平方÷﹙√a+√b﹚
=√a+√