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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

User Mevin Babu
by
8.1k points

1 Answer

1 vote

Answer:

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)

= x² + 4x + 2² = x² + 4x + 4

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

User Jeremy Gottfried
by
8.4k points

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