Resposta :
x² - 6x + 5x - 30 = 51 - x
x² - 6x + 5x - 30 - 51 + x = 0
x² + 0 - 81 = 0
x² - 81 = 0
D = Delta
D = b² - 4ac
D = 0² - 4 * 1 * (- 81)
D = 324
x = - b + raiz² de D
-------------------------------
2a
x = - 0 + raiz² de 324
-------------------------------
2 * 1
x = - 0 + 18
------------
2
x' = - 0 + 18
2
x' = 18
2
x' = 9
x" = - 0 - 18
2
x" = - 18
2
x" = - 9
Resposta = (9, -9)
x² - 6x + 5x - 30 - 51 + x = 0
x² + 0 - 81 = 0
x² - 81 = 0
D = Delta
D = b² - 4ac
D = 0² - 4 * 1 * (- 81)
D = 324
x = - b + raiz² de D
-------------------------------
2a
x = - 0 + raiz² de 324
-------------------------------
2 * 1
x = - 0 + 18
------------
2
x' = - 0 + 18
2
x' = 18
2
x' = 9
x" = - 0 - 18
2
x" = - 18
2
x" = - 9
Resposta = (9, -9)