Matemática
Conta apagada
12

x ao quadrado menos 4x menos 12 igual a zero

+1
(1) Respostas
rhevellyalves

[latex] x^{2} -4x-12=0[/latex] A = 1 B = (-4) C = (-12) [latex]Δ = (-4)^{2} -4.1.(-12)[/latex] [latex]Δ = 16 + 48[/latex] [latex]Δ = 64[/latex] [latex]x= \frac{ -(-4)+- \sqrt{64} }{2.1}[/latex] [latex]x= \frac{4+-8}{2}[/latex] [latex]x' = \frac{4+8}{2} = \frac{12}{2} = 6[/latex] [latex]x''= \frac{4-8}{2} = \frac{-4}{2} = -2[/latex] [latex]S= [6,-2][/latex]

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