√18+|1-√2|-√27-|2-√3|*√9

问题描述:

√18+|1-√2|-√27-|2-√3|*√9

原式=3√2+(√2-1)-3√3-(2-√3)*3
=3√2+√2-1-3√3-6+3√3
=4√2-7

√18+|1-√2|-√27-|2-√3|*√9
=3√2+√2-1-3√3-3*(2-√3)
=4√2-1-3√3-6+3√3
=4√2-7

1-√20
所以原式=3√2+(√2-1)-3√3-(2-√3)*9
=4√2-1-3√3-18+9√3
=4√2+6√3-19