Toán Lớp 8: Giúp mik với ạ
(X-1).(2x+2)-2x
C)(2x-1)mũ2 +4x
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Toán Lớp 8: Giúp mik với ạ
(X-1).(2x+2)-2x
C)(2x-1)mũ2 +4x
Comments ( 2 )
\left( {x – 1} \right)\left( {2x + 2} \right) – 2x\\
= 2x + 2x – 2x – 2 – 2x\\
= 2x – 2x – 2\\
= 2\left( {x – x – 1} \right)\\
c)\left( {2x – 1} \right) + 4x\\
= 4x – 4x + 1 + 4x\\
= 4x + 1
\end{array}\]