(1)(1+√5)(√5-1) (2)√2(√2+√8) (3)√8x√3/√6 (4)(√7-2√2)(2√2+√7)

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(1)(1+√5)(√5-1)(2)√2(√2+√8)(3)√8x√3/√6(4)(√7-2√2)(2√2+√7)(1)(1+√5)(√5-1)(2)√2(√2+√8)(3)√8x√3/√6(4)(√

(1)(1+√5)(√5-1) (2)√2(√2+√8) (3)√8x√3/√6 (4)(√7-2√2)(2√2+√7)
(1)(1+√5)(√5-1) (2)√2(√2+√8) (3)√8x√3/√6 (4)(√7-2√2)(2√2+√7)

(1)(1+√5)(√5-1) (2)√2(√2+√8) (3)√8x√3/√6 (4)(√7-2√2)(2√2+√7)
(1)(1+√5)(√5-1)
=5-1
=4
(2)√2(√2+√8)
=√2(√2+2√2)
=√2x3√2
=6
(3)√8x√3/√6
=√24/6
=√4
=2
(4)(√7-2√2)(2√2+√7)
=7-8
=-1

(1)(1+√5)(√5-1) =5-1=4
(2)√2(√2+√8) =2+4=6
(3)√8x√3/√6 =2
(4)(√7-2√2)(2√2+√7)=7-8=-1

(1)(1+√5)(√5-1)
=5-1
=4
(2)√2(√2+√8)
=√2(√2+2√2)
=√2x3√2
=6

(3)√8x√3/√6
=√24/6
=√4
=2

(4)(√7-2√2)(2√2+√7)
=7-8
=-1

你上课没听讲么…超级JD的~