(3√7+2倍√3)(2√3-3倍√7);(√32-3倍√3)(4√2+√27);要过程!(3√6-√4)²;(1+√2-√3)(1-√2+√3)要过程!

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(3√7+2倍√3)(2√3-3倍√7);(√32-3倍√3)(4√2+√27);要过程!(3√6-√4)²;(1+√2-√3)(1-√2+√3)要过程!(3√7+2倍√3)(2√3-3倍√

(3√7+2倍√3)(2√3-3倍√7);(√32-3倍√3)(4√2+√27);要过程!(3√6-√4)²;(1+√2-√3)(1-√2+√3)要过程!
(3√7+2倍√3)(2√3-3倍√7);(√32-3倍√3)(4√2+√27);要过程!
(3√6-√4)²;(1+√2-√3)(1-√2+√3)要过程!

(3√7+2倍√3)(2√3-3倍√7);(√32-3倍√3)(4√2+√27);要过程!(3√6-√4)²;(1+√2-√3)(1-√2+√3)要过程!
(3√7+2√3)(2√3-3√7)=(2√3)²-(3√7)²=12-63= -51
(√32-3√3)(4√2+√27)=(4√2-3√3)(4√2+3√3)=(4√2)²-(3√3)²=32-27=5
(3√6-√4)²=(3√6)²-2×3√6×√4+(√4)²=54-12√6+4=58-12√6
(1+√2-√3)(1-√2+√3)= [1+(√2-√3)] [1-(√2-√3)]
=1-(√2-√3)²=1-(5-2√6)=-4+2√6