add and subtract the expression in column A and B write the sum of the expression in column C and difference in column D
A
-12r
3xy
2a
4х²
-4m³ n²
B
15r
-5xy
5b
-12х²
-m³n²
C.
__
__
__
__
__
D.
__
__
__
__
__
paki answer po
A
-12r
3xy
2a
4х²
-4m³ n²
B
15r
-5xy
5b
-12х²
-m³n²
C.
__
__
__
__
__
D.
__
__
__
__
__
paki answer po
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