Answer
Option A is the one that is not equivalent to x² + 4x
(x + 2)² ≠ x² + 4x
Explanation
To solve this, we will have to expand each of these one at a time and see which ones give x² + 4x
Option A
(x + 2)²
= (x + 2) (x + 2)
= x (x + 2) + 2 (x + 2)
= x² + 2x + 2x + 4
= x² + 4x + 4
This is not equal to x² + 4x
Option B
(x + 2)² - 4
= (x² + 4x + 4) - 4
= x² + 4x + 4 - 4
= x² + 4x
Option C
x (x + 4)
= x² + 4x
Option D
(x + 4) x
= x² + 4x
Hope this Helps!!!
