Question

Given `y= x ^ { 2} + 2x` , what are the values of y(x) for x = -3, -2, -1, 0, 1, 2 and 3?

Answer 1

3, 0, -1, 0, 3, 8, and 15

Explanation:

To solve each of these problems, we simply need to plug our given x value into the equation, and find what y equals.

So, for the first one, x=-3, we substitute -3 in for all the x values in our equation.

`y=(-3)^2+2(-3)`

Then all we have to do is simplify.

`y=9-6 = y=3`

So our answer when x=-3 is 3.

Let's do one more, how about x=-1?

`y=(-1)^2+2(-1)=y=1-2=y=-1`

So when x=-1, y=-1, meaning our answer here is -1.

To get all the rest of the answers, we use the same method. Just plug in your given number for every x in the equation, and whatever y equals in the end is our answer.