(*)\(\left(2x-3\right)^2-\left(3x-2\right)^2=5x\left(2-x\right)\)
\(\Leftrightarrow\left(2x-3+3x+2\right)\left(2x-3-3x-2\right)-5x\left(2-x\right)=0\)
\(\Leftrightarrow\left(5x-1\right)\left(-x-5\right)-5x\left(2-x\right)=0\)
\(\Leftrightarrow-5x^2-25x+x+5-10x+5x^2=0\)
\(\Leftrightarrow-34x=-5\)
\(\Rightarrow x=\dfrac{34}{5}\)
Đề câu 1 bị sao đó.
(*)\(8x^3-12x^2+6x-1=0\)
\(\Leftrightarrow\left(2x-1\right)^3=0\)
\(\Leftrightarrow2x-1=0\)
\(\Rightarrow x=\dfrac{1}{2}\)
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