Question

f(x) =2x-1, x=1/2 and -1/2​

Answer 1

Answer:1/2 is a zero bit - 1/2 is not a zero

Step-by-step explanation: 2x-1,x=1/2

2 x 1 /2 -1=0

1-1=0  therefore it is a zero of polynomial f(x)

but in second case

2 x -1/2 -1

-1-1

-1+-1=-2 therefore it is not the zero of polynomial f(x)

Answer 2

Step-by-step explanation:

f(x) = 2x-1 ------ (a)

Put x=1/2 in (a)

f(1/2) = 2×1/2 -1

f(1/2) = 1 - 1

f(1/2) = 0

Put x = -1/2 in (a)

f(-1/2) = 2×-1/2 - 1

f(-1/2) = -1 - 1

f(-1/2) = -2

Therefore, 1/2 is a zero of 2x-1 but -1/2 is not a zero of 2x-1