d)=\(4\sqrt{b}+4\sqrt{10b}-9\sqrt{10b}\)=\(4\sqrt{b}-5\sqrt{10b}\)
e)=\(6+\sqrt{15}-2\sqrt{15}\)=\(6-\sqrt{15}\)
f)=\(5\sqrt{10}+10-5\sqrt{10}\)=10
g)=\(\sqrt{196}-\sqrt{84}-\sqrt{49}+2\sqrt{21}\)=14-\(2\sqrt{21}\)-7+\(2\sqrt{21}\)=7
h)=\(\sqrt{1089}-\sqrt{198}-\sqrt{121}+3\sqrt{22}\)
=\(33-3\sqrt{22}-11+3\sqrt{22}\)=22
Đúng 0
Bình luận (0)