Question

2xla puterea 2 +x-5=0
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Answer 1

$2x^2+x-5 =0$

$x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$x_{1,\:2}=\frac{-1\pm \sqrt{1^2-4\cdot \:2\left(-5\right)}}{2\cdot \:2}$

$x_{1,\:2}=\frac{-1\pm \sqrt{41}}{2\cdot \:2}$

$x_{1}=\frac{-1+\sqrt{41}}{4},\:x_{2}=\frac{-1-\sqrt{41}}{4}$