Toán Lớp 8: Thực hiện phép tính
(5/4-5/4):9-x^2/1+2x+x^2
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Toán Lớp 8: Thực hiện phép tính
(5/4-5/4):9-x^2/1+2x+x^2
Comments ( 1 )
\left( {\dfrac{5}{4} – \dfrac{5}{4}} \right):9 – \dfrac{{{x^2}}}{{1 + 2x + {x^2}}}\\
= 0:9 – \dfrac{{{x^2}}}{{{{\left( {1 + x} \right)}^2}}}\\
= 0 – {\left( {\dfrac{x}{{1 + x}}} \right)^2}\\
= – {\left( {\dfrac{x}{{1 + x}}} \right)^2}
\end{array}$