Answer:
+ 100
Explanation:
Given
m² - 20m
To complete the square
add ( half the coefficient of the m- term )² to m² - 20m
m² + 2(- 10)m + (- 10)²
= m² - 20m + 100 = (m - 10)² ← perfect square
6.0m questions
7.9m answers