Answer:
Step-by-step explanation:
A student writes down four random numbers: -20, 55, 10, -15. A second students adds one number to the set, making the average 11
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Answer:
Step-by-step explanation:
Given
x² + x
To complete the square
add ( half the coefficient of the x- term )² to x² + x
x² + 2( )x + (
)² = x² + x +
= (x + )² ← perfect square