Instead of using the LCM as a common denominator, a student writes
Choose the correct answer below.
OA. The student multiplied
6
2x-y
4
y-2x
by the reciprocal,
2x-y
6
OB. The student multiplied by the reciprocal, x
y-2x
OC. The student multiplied the numerator and denominator of
+
y-2x by -1.
6
OD. The student multiplied the numerator and denominator of by -1.
2x-y
as
2x-y y-2x y-2x y-2x
-6
AX
ام
Explain what the student did.