Question

question 20
evaluate.
$(-5)^2$
answer

Explanation:

Step1: Recall the exponent rule

The expression \((-5)^2\) means multiplying \(-5\) by itself. The formula for \(a^n\) (where \(n = 2\) here) is \(a\times a\). So for \(a=-5\) and \(n = 2\), we have \((-5)\times(-5)\).

Step2: Multiply the two negative numbers

When we multiply two negative numbers, the result is positive. And \(5\times5 = 25\), so \((-5)\times(-5)=25\).

Answer:

25