\(2x^2+3x-5\\ =\left(2x^2-2x\right)+\left(5x-5\right)\\ =2x\left(x-1\right)+5\left(x-1\right)\\ =\left(x-1\right)\left(2x+5\right)\)
\(2x^2+3x-5\)
\(=2x^2-2x+5x-5\)
\(=\left(2x^2-2x\right)+\left(5x-5\right)\)
\(=2x.\left(x-1\right)+5.\left(x-1\right)\)
\(=\left(x-1\right).\left(2x+5\right)\)
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quá dễ
Ta có: \(2x^2+3x-5\)
\(=2x^2-2x+5x-5\)
\(=\left(2x^2-2x\right)+\left(5x-5\right)\)
\(=2x\left(x-1\right)+5\left(x-1\right)\)
\(=\left(x-1\right)\left(2x+5\right)\)