Question

(FUVEST-SP)SE X (1 - X )= 1 SOBRE 4 ENTÃO:
A)3
B)4
C)5
D)6

Answer 1

X (1 - X )= 1 SOBRE 4 
x-x²=1/4

x²-x+1/4=0

x'=[1+√(1-1)]/2=1/2

x''=[1-√(1-1)]/2=1/2