Question

What is the missing constant term in the perfect square that starts with x^2+2x?

Answer 1

+ 1

Explanation:

Given

x² + 2x

Using the method of completing the square

add ( half the coefficient of the x- term)² to x² + 2x

= x² + 2(1)x + 1²

= x² + 2x + 1

= (x + 1)² ← perfect square