Toán 9

C

cun_crazy

a)[TEX]\sqrt{2} . x-\sqrt{50} = 0[/TEX]
b)[TEX]\sqrt{3} .x +\sqrt{3} = \sqrt{12} +\sqrt{27}[/TEX]
giải
a)[TEX]\sqrt{2} . x=\sqrt{50}[/TEX]
[TEX]x=\frac{\sqrt{50}}{\sqrt{2}}[/TEX]
[TEX]x=\sqrt{25}[/TEX]
x=5
b)[TEX]\sqrt{3}.(x-1)=2\sqrt{3}+3\sqrt{3}[/TEX]
[TEX]\sqrt{3}.(x-1)=5\sqrt{3}[/TEX]
[TEX]x-1=\frac{5\sqrt{3}}{\sqrt{3}}[/TEX]
x-1=5
x=6
 
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