Question

Tim x: 3(x-1)^2 - 3x(x-5) = 1 ; x^2 - 2x + 1 Mn giup e vs ak

Answer 1

\(3\left(x-1\right)^2-3x\left(x-5\right)=1\)

\(\Leftrightarrow\)\(3x^2-6x+3-3x^2+15x=1\)

\(\Leftrightarrow\)\(9x=-2\)

\(\Leftrightarrow\)\(x=-\frac{2}{9}\)

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\(x^2-2x+1=25\)

\(\Leftrightarrow\)\(x^2-2x-24=0\)

\(\Leftrightarrow\)\(\left(x+4\right)\left(x-6\right)=0\)

\(\Leftrightarrow\)\(\orbr{\begin{cases}x+4=0\\x-6=0\end{cases}}\)

\(\Leftrightarrow\)\(\orbr{\begin{cases}x=-4\\x=6\end{cases}}\)

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