ii各种不服
幼苗
共回答了27个问题采纳率:92.6% 举报
1.2√ 10 ×(-√ 40)
=-2√10×2√10
=-40
2.√ 20a ×√ a^3/5(a≥0)
=2√(5a)×a√(a/5)
=2a×√a²
=2a×a
=2a²
3.√ 0.4 ×√ 3.6
=√(0.4×3.6)
=√1.44
=1.2
4.√ x × √ xy^2 (x,y≥0)
=√(xy)²
=xy
5.√ 32×2√2
=4√2×2√2
=8×2
=16
6.1/2(4√ 3 × 8)
=2√3×8
=16√3
1年前
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