Question

Evaluate the expression if x=-1 and y=-2. 3xy+3

Answer 1

The result of the evaluation is 9

Step-by-step explanation

In these 'evaluation' problems we have to replace each variable by the given value. Here, we have to replace every x we find in the expression by the value -1 and every y by the value -2:

`\begin{gathered} 3xy+3 \\ \text{replace} \\ 3(-1)(-2)+3 \end{gathered}`

The product of two negative numbers gives a positive number as a result:

`3\cdot2+3`

As shown above, we have to start by the products and divisions in each term:

`3\cdot2+3=6+3`

And finally add or subtract the terms:

`6+3=9`