Question

x 2 +3 - 4x = 0 - коэфициент а, b, c
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Answer 1

Resposta:

S={1, 3}

Explicação passo-a-passo:

$x {}^{2} + 3 - 4x = 0$

$x {}^{2} - 4x + 3 = 0$

$a = 1 \: \: \: b = - 4 \: \: c = 3$

$delta = b {}^{2} - 4ac$

$delta = ( - 4) {}^{2} - 4.1.3 = 16 - 12 = 4$

$\sqrt{4} = 2$

$x1 = \frac{ - ( - 4) + 2}{2.1} = \frac{4 + 2}{2} = \frac{6}{2} = 3$

$x2 = \frac{ - ( -4 ) - 2}{2.1} = \frac{4 - 2}{2} = \frac{2}{2} = 1$

Answer 2

X^2 +3 - 4x = 0
x^2 - 4x + 3 = 0

Coeficientes:
a = 1; b = - 4; c = 3

/\= b^2 - 4ac
/\= (-4)^2 - 4.1.3
/\ = 16 - 12
/\= 4
x = ( - b +/- \/ /\)/ 2a
x = [-(-4) +/- \/4]/ 2.1
x = (4 +/-2)/2
X' = (4+2)/2 = 6/2= 3
x " = (4-2)/2 = 2/2= 1

Raízes = {1,3}