kho wa jup toi vs

B

baoduy2011

[TEX] \overline{aabb}= \overline{(a+1)(a+1)}. \overline{(b-1)(b-1)}[/TEX]

[TEX]\Leftrightarrow 111a-11ab-10b+11=0[/TEX]

[TEX]\Leftrightarrow (11a+10)(111-11b)=989[/TEX]

ma` [TEX]989=1.989=23.43 \Rightarrow a=3, b=8[/TEX]

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