Question

What is the constant term in the perfect square that starts with x2-4x

Answer 1

4

Explanation:

Answer 2

add 4

Explanation:

x^2-4x

Take the coefficient of the x term

-4

Divide it by 2

-4/2 =-2

Square it

(-2)^2 = 4

This is what we add to each side

x^2-4x +4 = 4