(1+根号2-根号3)(1-根号2+根号3)=?
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(1+根号2-根号3)(1-根号2+根号3)=?
(1+根号2-根号3)(1-根号2+根号3)=?
(1+根号2-根号3)(1-根号2+根号3)=?
你好,纷飞红雪幻 :
此题利用平方差公式:
(1+√2-√3)(1-√2+√3)
=[1+(√2-√3)][1-(√2-√3)]
=1²-(√2-√3)²
=1-(2+3-2√6)
=1-5+2√6
=2√6-4
(1+根号2-根号3)(1-根号2+根号3)
=(1+根号2-根号3)(1-(根号2-根号3))
=1-(根号2-根号3)^2
=-4+2根号6