Toán Lớp 8: giúp em ạ,em cảm ơn
2x^2-11x-9
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Toán Lớp 8: giúp em ạ,em cảm ơn
2x^2-11x-9
Comments ( 2 )
2{x^2} – 11x – 9\\
\Rightarrow 2{x^2} – 2x – 9x + 9\\
\Rightarrow 2x(x – 1) – 9(x – 1)\\
\Rightarrow (x – 1)(2x – 9)
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