Question

The screenshot below...

Answer 1

For this case we have:

Expression 1:

$\frac {2m ^ 2-4m} {2 (m-2)} = \frac {2m (m-2)} {2 (m-2)} = m$

Expression 2:

$\frac {m ^ 2-2m + 1} {(m-1)} = \frac {(m-1) (m-1)} {(m-1)} = (m-1)$

Expression 3:

$\frac {m ^ 2-3m + 2} {m ^ 2-m} = \frac {(m-2) (m-1)} {m (m-1)} = \frac {(m-2) } {m}$

Expression 4:

$\frac {m ^ 2-m-2} {m ^ 2-1} = \frac {(m-2) (m + 1)} {(m + 1) (m-1)} = \frac {( m-2)} {(m-1)}$

Answer:

1.D

2.B

3.A

4.C