Question

Qual o calculo e o resultado? X² - 11x + 30 = 0 ?

Answer 1

x² - 11x + 30 = 0

a = 1
b = -11
c = 30

$x =\frac{ -b \frac{+}{} \sqrt{ b^{2}-4ac}}{2a}$

$x =\frac{ 11 \frac{+}{} \sqrt{ (-11)^{2}-4*1*30}}{2*1}$

$x =\frac{ 11 \frac{+}{} \sqrt{ 121-120}}{2}$

$x =\frac{ 11 \frac{+}{} \sqrt{1}}{2}$

$x =\frac{ 11 \frac{+}{} {1}}{2}$

$x^{1} =\frac{ 11 {+} {1}}{2} = \frac{12}{2} = 6$

$x^{2} =\frac{ 11 -1}{2} = \frac{10}{2} = 5$

Answer 2

x² - 11x + 30 = 0

x = 11 + - √121 - 120
     ------------------------
                  2

x' = 11 + 1
      ---------  → x' = 6
          2

x" = 11 - 1
      ---------  →  x" = 5
          2