Toán Lớp 9: $\sqrt{18}-2\sqrt{50}+2\sqrt{8}$
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Toán Lớp 9: $\sqrt{18}-2\sqrt{50}+2\sqrt{8}$
Comments ( 2 )
=sqrt(3^2*2)-2sqrt(5^2*2)+2sqrt(2^2*2)
=3sqrt2-10sqrt2+4sqrt2
=-3sqrt2