Question

Mim ajudem! - x² + 2 x - 4 = 0

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Answer 1

Resposta:

OLÁ

VAMOS A SUA PERGUNTA:⇒⇒

$\sf -x^2+ 2 x - 4 = 0$

$\sf -x^2+2x-4-(-4)=-(-4)$

$\sf -x^2+2x=-(-4)$

$\sf -x^2+2x=4$

$\sf \dfrac{-x^2+2x}{-1} =\dfrac{4}{-1}$

$\sf x^2+ \dfrac{2}{-1} x=\dfrac{4}{-1}$

$\sf x^2-2x=\dfrac{4}{-1}$

$\sf x^2-2x=-4$

$\sf x^2-2x+1=-4+1$

$\sf x^2-2x+1=-3$

$\sf (x-1)^2=-3$

$\sf \sqrt{(x-1)^2}=\sqrt{-3}$

$\sf x-1= \sqrt{3i} \\x-1=- \sqrt{3i}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \red{x=-\sqrt{3i}+1\approx1-1.732050808i} }}}\ \checkmark\\\\\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \blue{x=1+\sqrt{3i}\approx1+1.732050808i} }}}\ \checkmark$←←↑↑ RESPOSTA.

Explicação passo-a-passo:

ESPERO TER AJUDADO