(√18-√27)÷√6+8√(1/2)=多少?
问题描述:
(√18-√27)÷√6+8√(1/2)=多少?
答
根三减二分之五倍的根二
答
(√18-√27)÷√6+8√(1/2)=2(√2-√3)÷√6+4√2=(2√3-3√2)/3+4√2
=(2√3+9√2)/3
答
(√18-√27)÷√6+8√(1/2)
=√3(√6-√9)÷(√3*√2)+4√[4*(1/2)]
=(√6-√9)÷√2+4√2
=(√6-√9)*√2÷(√2*√2)+4√2
=(√6-√9)*√2÷2+4√2
=(2√3-3√2)÷2+4√2
=√3-3√2/2+4√2
=√3+5√2/2