Toán Lớp 9: 3$\sqrt{50}$ – 7$\sqrt{8}$ + 12$\sqrt{18}$
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Toán Lớp 9: 3$\sqrt{50}$ – 7$\sqrt{8}$ + 12$\sqrt{18}$
Comments ( 2 )
= 3\sqrt{25 . 2} – 7\sqrt{4.2} + 12\sqrt{9.2}
= 3.5\sqrt{2} – 7.2\sqrt{2} + 12.3\sqrt{2}
= 15\sqrt{2} – 14\sqrt{2} + 36\sqrt{2}
= 37\sqrt{2}