Question

qual a solução da equação
$x2 - 5 \times + 6 = 0 = |$
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Answer 1

$\Large\boxed{\begin{array}{l}\sf x^2-5x+6=0\\\sf\Delta=b^2-4ac\\\sf\Delta=(-5)^2-4\cdot1\cdot6\\\sf\Delta=25-24\\\sf\Delta=1\\\sf x=\dfrac{-(-5)\pm\sqrt{1}}{2\cdot1}\\\\\sf x=\dfrac{5\pm1}{2}\begin{cases}\sf x_1=\dfrac{5+1}{2}=\dfrac{6}{2}=3\\\\\sf x_2=\dfrac{5-1}{2}=\dfrac{4}{2}=2\end{cases}\\\sf S=\{2,3\}\end{array}}$