最简二次根试:(1)根号25a^3 (2)根号3/根号5 (3)根号0.3
问题描述：
最简二次根试:(1)根号25a^3 (2)根号3/根号5 (3)根号0.3
最简二次根式:(1)根号25a^3 (2)根号3/根号5 (3)根号0.3 (4)1/2根号13^2-11^2 (5)根号8/根号2a(6)根号2/3根40
答
:(1)根号25a^3
=5a√a;
(2)根号3/根号5
=√15/5;
(3)根号0.3
=√30/10;
(4)1/2根号13^2-11^2
=(√(13+11)(13-11)/2)
=√(24×2)/2
=√48/2
=4√3/2
=2√3;
(5)根号8/根号2a
=√8/√2a
=√4/a;
=2√a/a;
(6)根号2/3根40
=√2/3√40
=√2/3×2√10
=√5/30;
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