Toán Lớp 8: Tìm giá trị của
A=45^2-90×21+21^2
————————-
44^2-22^2
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Toán Lớp 8: Tìm giá trị của
A=45^2-90×21+21^2
————————-
44^2-22^2
Comments ( 2 )
A = \frac{{{{45}^2} – 90.21 + {{21}^2}}}{{{{44}^2} – {{22}^2}}}\\
A = \frac{{{{\left( {45 – 21} \right)}^2}}}{{66.22}}\\
A = \frac{{{{24}^2}}}{{66.22}}\\
A = \frac{{576}}{{1452}}\\
A = \frac{{48}}{{121}}
\end{array}\]