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The addictive inverse is positive while the multiplicative inverse is negative
Answer:

Step-by-step explanation:
Given:

Required
Determine the sum of the solutions
This question will be answered using quadratic formula:

Where:



So, we have:




or 
The sum of the solution is then calculated as:

Take L.C.M



Answer:
0.117
Step-by-step explanation:
(-0.3)(-0.39)=0.117