calcule o valor do x de x²-2x=0
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Resposta:
x
2
+2x−3=0
\color{dodgerblue}{\Delta={b}^{2}-4ac}Δ=b
2
−4ac
\color{dodgerblue}{\Delta={2}^{2}-4.1.(-3)}Δ=2
2
−4.1.(−3)
\color{dodgerblue}{\Delta=4+12}Δ=4+12
\color{dodgerblue}{\Delta=16}Δ=16
\color{blueviolet}{x=\frac{-b±\sqrt{\Delta}}{2a}}x=
2a
−b±
Δ
\color{blueviolet}{x=\frac{-2±\sqrt{16}}{2.1}}x=
2.1
−2±
16
\color{blueviolet}{x=\frac{-2±4}{2}}x=
2
−2±4
\color{blueviolet}{x'=\frac{-2+4}{2}=\frac{2}{2}=1}x
′
=
2
−2+4
=
2
2
=1
\color{blueviolet}{x''=\frac{-2-4}{2}=-\frac{6}{2}=-3}x
′′
=
2
−2−4
=−
2
6
=−3
Espero ter ajudado
Aurora52:
Que isso querida
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