Question

# Add : $ab-4a,4b-ab,4a-4b$

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Solution

## To add : $ab-4a,4b-ab,4a-4b$Simplify given expressionOn combining the like terms and adding them we get$\begin{array}{rcl}& =& ab–4a+\left(4b–ab\right)+\left(4a–4b\right)\\ & =& ab–4a+4b–ab+4a–4b\\ & =& ab–ab–4a+4a+4b–4b\\ & =& ab\left(1-1\right)+a\left(4–4\right)+b\left(4–4\right)\\ & =& ab\left(0\right)+a\left(0\right)+b\left(0\right)\\ & =& 0\end{array}$Hence, required answer is $0$.

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