Question

Suppose a - b = 0Which of the these expressions equals ab?

Answer 1

We are given the expression:

`a-b=0`

To simplify

Let us add b to both sides

`a-b+b=0+b`

Simplifying further

`a=b`

Then, we are told to find the value of ab

`\begin{gathered} ab=a* b \\ \sin ce\text{ } \\ b=a \\ \text{then} \\ a* b=a* a=a^2 \\ ab=a^2 \end{gathered}`

Thus the answer is

a² (option A)