Evaluate the exprssion for -5a2;a=-2, and explain how its done

Expert Answers
hala718 eNotes educator| Certified Educator

Given the expression:

`-5a^2` 

We need to find the value of the expression when `a= -2`

Then, we will plug in `a= -2`  into the expression.

`==gt -5a^2 = -5(-2)^2` 

Now we will simplify and find the value.

`==gt -5a^2 = -5(4) = -20`

Then, the value of the expression -5a`^2`  when a= -2 is -20.

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