Question

determine o conjunto solução da equação do 2° grau x² - 2x = 2x - 4​

Answer 1

Boa Tarde !!!

$x^{2} - 2x = 2x - 4\\\\x^{2} -2x -2x +4 =0\\\\x^{2} - 4x + 4\\\\Resolu\c{c}\~{a}o\ por\ bh\'askara.\\\\\downarrow Coeficientes\downarrow\\\\a)\ 1\\\\b)\ -4\\\\c)\ 4\\\\\Delta=b^{2} -4.a.c\\\\\Delta=(-4)^{2} -4.1.4\\\\\Delta=16 - 16\\\\\Delta=0\\\\\begin{equation}x = \frac{-b\pm\sqrt{\Delta}}{2.a}\\\\x = \frac{4\pm\sqrt{0}}{2.1}\\\\x'= \frac{4+0}{2}\\\\x'=\frac{4}{2} \\\\x'=2\\\\x" = \frac{4 - 0}{2}\\\\x" = \frac{4}{2}\\\\x" = 2\\\\s = [+2, +2]$

Espero ter ajudado :-)

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