(1-根号2+根号3)(1-根号2-根号3) 求值
(1-根号2+根号3)(1-根号2-根号3)=(1-√2+√3)(1-√2-√3)=(1-√2)^2-√3^2 =1-2√2+2-3 =-2√2
(1-根号2+3)(1-根号2-根号3)计算
=(1-根号2)(1-根号2)-(1-根号2)根号3+3(1-根号2)-3根号3 =3-2根号2-根号3-根号6+3-3根号2-3根号3 =6-5根号2-4根号3-根号6
计算:(1-根号2+根号3)(1+根号2-根号3)
原式=[1-(√2-√3)][1+(√2-√3)]=1-(√2-√3)^2 =1-(5-2√6)=2√6-4
(1-根号2+根号3)(1+根号2-根号3)等于
(1-根号2+根号3)(1+根号2-根号3)=1-(√3-√2)²=1-(3-2√6+2)=1-(5-2√6)=2√6-4
(1+更号2-根号3)x(1-更号2-更号3)
原式=[(1-√3)+√2]×[(1-√3)-√2]即(a+b)(a-b)。按公式得a²-b²=(1-√3)²-(√2)²=(4-2√3)-2 =2-2√3 这类题关键是要发现数是一样的,就是前面的正负号不一样。然后通过搭配成a+b)(a-b),使最后简化抵消成a²-b²
(1+根号2+根号3)(1-根号2-根号3)怎么算?
把后边的根号二和根号三放在一起,【1+(根号2+根号3)】【1-(根号2+根号3)】=1--(根号2+根号3)的平方=1-(2+3+2倍根号6)=4-2倍根号六
(1+根号2+根号3)(1-根号2-根号3)怎么算
(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)平方=1-(10+2根号6)=-9-2根号6
九年级上册数学题 (1+根号2-根号3)(1-根号2+根号3)
原式=(1+(根号2-根号3))*(1-(根号2-根号3))=1-(根号2-根号3)*(根号2-根号3)=1-2-3+2*根号6=2*根号6-4
要过程;(1+根号2-根号3)(1-根号2+根号3)+2根号6
解:依题意得算式,(1+√2-√3)×(1-√2+√3)+2√6 =[1+(√2-√3)]×[1-(√2-√3)]+2√6 =1的平方-(√2-√3)的平方+2√6 =1-(2-2√6+3)+2√6 =1-(5-2√6)+2√6 =1-5+2√6+2√6 =-4+4√6 即(1+√2-√3)×(1-√2+√3)+2√6=...
(1+√2-√3)·(1-√2+√3)怎么算?
利用平方差公式 (1+√2-√3)·(1-√2+√3)=[1+(√2-√3)]*[1-(√2-√3)]=1^2-(√2-√3)^2 =1-(2-2*√2*√3+3)=1-2+2√6-3 =2√6-4