Question

Me ajudem!?
Eu quero essa Equação 2ײ+×=1 na fórmula bhaskara

Answer 1

2ײ+×-1=0
a=2
b=1
c= -1
b^2-4.a.c
1^2 -4*2*(-1) = 9

1+-3/2*2

x' = 1+3/4 = 1
x'' = 1-3/4 = -1/2

Answer 2

Resposta:

$S=\{-1,\frac{1}{2} \}$

Explicação passo-a-passo:

Fórmula de Bhaskara: $x=\frac{-b\pm\sqrt{\Delta}}{2a}$

Resolução:

$2x^{2} +x=1\\2x^{2} +x-1=0\\\\a=2\\b=1\\c=(-1)\\\\\Delta=b^{2} -4ac\\\Delta=1^{2} -4\times2\times(-1)\\\Delta=1+8\\\Delta=9$

$x=\frac{-b\pm\sqrt{\Delta} }{2a} \\\\x=\frac{-1\pm\sqrt{9} }{2\times2} \\\\x=\frac{-1\pm3}{4}$

$x_{1} =\frac{-1+3}{4} =\frac{2^{\div2}}{4^{\div2}} =\frac{1}{2} \\\\x_{2} =\frac{-1-3}{4} =-\frac{4}{4} =-1$