Question

se f(x)=x2+bx+c e tal que f(-1)=1 e f(1) = -1 calcule o valor bc

Answer 1

Ola Rony 

f(x) = x² + bx + c

f(1) = 1 + b + c = -1
f(-1) = 1 - b + c = 1

b + c = -2
-b + c = 0

2c = -2
c = -1

b - 1 = -2
b = -1

.