Which represents a quadratic function?

a) f(x) = −8x3 − 16x2 − 4x
b) f (x) = x 2 + 2x − 5
c) f(x) = + 1
d) f(x) = 0x2 − 9x + 7

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it