Question

resolva a equação:

|2 2 2|
|2 x 2| = 0
|2 2 x|

Answer 1

[(2 × 2 × 2) + (2 × x × x) + (2×2×2)] - [(2 × 2 × x) + (2 × x × 2) + (2 × 2 × 2)] = 0

(8 + 2x² + 8) - (4x + 4x + 8) = 0
16 + 2x² - 8x - 8 = 0
2x² - 8x + 8 = 0

# x² - 4x + 4 = 0


•x' = 2;
•x" = 2.