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# Help!

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If a*b=2a+3b for all a and b, then what is the value of 4*3\$

Sep 24, 2019

#1
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I see... the * isn't multiplication....

It would have been far clearer if you had either stated that up front or used a different symbol.

Sep 24, 2019
edited by Rom  Sep 24, 2019
#2
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If a*b=2a+3b for all a and b, then what is the value of 4*3

$$\begin{array}{|rcll|} \hline 4*3 &=& 2\cdot 4 + 3\cdot 3 \\ &=& 8+9 \\ &=& \mathbf{17} \\ \hline \end{array}$$

Sep 24, 2019