Answer:
1
Step-by-step explanation:
We just plug in the 3 into the equation:
m² - 5m + 7
3² - 5(3) + 7
Following PEMDAS, we do parenthesis first
3² - 15 + 7
Then we do exponent next
9 - 15 + 7
Since it’s just add and subtract left, we go left to right
-6 + 7
1
