实数计算(1)5√7-√7 (2)4√5-(√6+2√5) (3)√(3-π)²+|3-√3|第(2)题我不知道对不对解:原式=4√5-√6-2√5 =(4-2)√5-√6 =2√5-√6

问题描述:

实数计算
(1)5√7-√7 (2)4√5-(√6+2√5) (3)√(3-π)²+|3-√3|
第(2)题我不知道对不对
解:原式=4√5-√6-2√5
=(4-2)√5-√6
=2√5-√6

(1)5√7-√7
=(5-1)√7
=4√7
(2)4√5-(√6+2√5)
=4√5-√6-2√5
=(4-2)√5-√6
=2√5-√6
(3)√(3-π)²+|3-√3|
=|3-π|+|3-√3|
=π-3+3-√3
=π-√3