√8-2√18+6√1⼀2等于多少,要详细过程哦

2025-06-21 15:16:51
推荐回答(2个)
回答1:

√8-2√18+6√1/2
=2根号2-2*3根号2+6*根号2/2
=2根号2-6根号2+3根号2
=-根号2

回答2:

=2√2-2×3√2+6×√2/2
=2√2-6√2+3√2
=-√2