A) + 3
B) + 2
C) + 5
D) - 3
Correct Answer: C
Solution :
\[\overset{\,\,\,*}{\mathop{M{{g}_{2}}{{P}_{2}}{{O}_{7}}}}\,\] \[4+2x-2\times 7=0\];\[2x=14-4=10\] \[2x=10\]; \[x=\frac{10}{2}=+\,5\].You need to login to perform this action.
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