Question

alguem pode me ajudar?​

Answer 1

10 ^ x²-2x-2 = 10 ^1. => destrua a base 10

x² -2x -2 = 1

x² -2x -3 = 0

∆ = (-2)² -4.1.(-3) = 4 +12= 16 => √∆=4

x = -b±√∆/2a

x = 2±4/2.1

x' = 2+4/2 = 6/2 = 3

x" = 2-4/2 = -2/2= -1

====> b) {-1 , 3 }