Question

1:colcule
a6112²49x-1)+(x² +5X-3)​

Answer 1

Resposta:

x²/3 - 5x/3 + 1 = 2x/3 + 11/3

x² - 5x + 3 = 2x + 11

x² - 5x - 2x + 3 - 11 = 0

x² - 7x - 8 = 0

delta = ( -7)² - 4.1.(-8)

delta = 49 + 32

delta = 81

x' = 7 + 9/2

x' = 16/2

x' = 8

x'' = 7 - 9/2

x'' = -2/2

x'' = -1

S = { 8, -1 }