3/(2+2√3)怎么化简?
问题描述:
3/(2+2√3)怎么化简?
答
先为分母配成平方差公式 分子分母同乘 (2-2√3) 得到分式=3(2-2√3)/(2+2√3)(2-2√3)=3(2-2√3)/(4-12)=3(2-2√3)/(-8)=(3√3-3)/4
答
3/(2+2√3)
=3(2-2√3)/{(2+2√3)(2-2√3)}
=3(2-2√3)/(4-12)
=3/8*(2-2√3)
=3/4(2+2√3)
答
原式=3(2√3-2)/(2√3-2)(2+2√3)
=3(2√3-2)/(12-4)
=(6√3-6)/8
=(3√3-3)/4
答
3/(2+2√3)
=3(2-2√3)/[(2+2√3)*/(2-2√3)]
=(6-6√3)/(4-12)
=(3-3√3)/4