Describe the error made in subtracting the two

rational expressions shown

1 1

x-

2x+1

x + 1

x-2

(x-2) (x+1) (x - 2) (x + 1)

(x-2) (x+1)

You must subtract all terms of the numerator being subtracted out, not just the first term.

The negative 2 should have been subtracted out to get a numerator of x+1-x+2

The simplified numerator of the difference should be 3, not - 1.