Question

(Determinantes) - Resolva a equação:

$\left[\begin{array}{ccc}2&3&-2\\0&1&x\\2&x&-3\end{array}\right] = 2$

Answer 1

Ola Jplay

2   3  -2  2   3
0   1   x  0    1
2   x  -3  2    x

det = -6 + 6x + 0 + 4 - 2x² - 0 = 2

2x² - 6x + 4 = 0 

x² - 3x + 2 = 0

delta
d² = 9 - 8 = 1
d = 1

x1 = (3 + 1)/2 = 4/2 = 2
x2 = (3 - 1)/2 = 2/2 = 1