Question

Evaluate the expression below for x = 7and y = -6 XY - 20+ y^2

Answer 1

The expression we have to evaluate is:

`xy-20+y^2`

We have the values for x and y:

`\begin{gathered} x=7 \\ y=-6 \end{gathered}`

Step 1. Substitute the values of x and y into the expression:

`(7)(-6)-20+(-6)^2`

Step 2. Solve the operations

we first need to solve the exponent, given that (-6)^2 is equal to 36:

`(7)(-6)-20+36`

Next, we need to solve the multiplication between 7 and -6, which results in -42:

`-42-20+36`

And finally, we solve the additions and substractions:

`\begin{gathered} -42-20+36 \\ -62+36 \\ -26 \end{gathered}`

Answer: -26