Question

What number should be added to the expression x^2 + 4x to change it into a perfect square trinomial

Choose all correct answers

4

1

8

2

Answer 1

4

Explanation:

given

x² + 4x

To change it into a perfect square

add (half the coefficient of the x- term)² to x² + 4x

x² + 4x + (
`(4)/(2)`)²

= x² + 4x + 2² = x² + 4x + 4

and x² + 4x + 4 = (x + 2)² ← a perfect square