Question

Evaluate the expression. y^{2}-y \text { when } y=-2

Short answer

The value of the expression \(y^{2}-y\) when \(y=-2\) is 6.

Step-by-step solution

Substitute the value of y into the expression

Replace \(y\) in the expression \(y^{2}-y\) with -2. After this substitution, our expression would look like: \((-2)^{2} - (-2)\).

Apply the order of operations

We must follow the order of operations, which says we should calculate the exponent before doing subtraction. When we square -2, we get 4, and -(-2) gives us 2. So, the expression becomes: \(4 + 2\).

Perform the addition

Now we perform the addition operation to find the final answer: \(4 + 2 = 6\).