Question

Me ajudem ( x - 1 )² + 3 x = x + 26 me falem a resposta PF

Answer 1

$(x-1)^2+3x=x+26$ =>
$x^2-2x+1+3x=x+26$ =>
$x^2+x+1=x+26$ =>
$x^2+x-x=26-1$ =>
$x^2=25$ =>
$x=\frac{+}{-}\sqrt{25}$ =>
$x=\frac{+}{-}5$.

S = { -5, 5 }.

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x^2-25=0

coeficientes:
a = 1
b = 0
c = -25

Bhaskara:

Δ$=b^2-4ac$ =>
Δ$=0^2-4.1.(-25)$ =>
Δ$=100$.

$x=\frac{-b\frac{+}{-}\sqrt{DELTA}}{2a}$ =>
$x=\frac{0\frac{+}{-}\sqrt{100}}{2}$.
$x=\frac{\frac{+}{-}10}{2}$.

$x_{1}=\frac{10}{2}$ =>
$x_{1}=5$.


$x_{2}=\frac{-10}{2}$ =>
$x_{2}=-5$.


S = { -5, 5 }.