Toán Lớp 8: 2x^2-6xy+5x-15y giải vs 2 cách ạ
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Toán Lớp 8: 2x^2-6xy+5x-15y giải vs 2 cách ạ
Comments ( 1 )
C1:\\
2{x^2} – 6xy + 5x – 15y\\
= 2x.\left( {x – 3y} \right) + 5.\left( {x – 3y} \right)\\
= \left( {x – 3y} \right)\left( {2x + 5} \right)\\
C2:\\
2{x^2} – 6xy + 5x – 15y\\
= 2{x^2} + 5x – 6xy – 15y\\
= x\left( {2x + 5} \right) – 3y\left( {2x + 5} \right)\\
= \left( {2x + 5} \right)\left( {x – 3y} \right)
\end{array}$