Question

What must be added to 4xsquare+20x+16 so that it becomes a perfect square

Answer 1

Answer:

- 4x because 4x sq and 16

Step-by-step explanation:

both of these are perfect squares of 2x and 4

now (2x+4)^2

gives 4x sq + 16x + 16

which is 4x less than our original expression so we

add MINUS 4x