|x| = x
always
sometimes
never

sometimes

Step-by-step explanation:

|x| = x

Lets look at some cases

x>0

Example

3

|3| = 3

3  = 3

Always when x>0

x=0

Example

0

|0| = 0

0  = 0

Always when x=0

x<0

Example

-3

|-3| = -3

3  = -3

Never when x<0

It is only true when x >= 0

So it is sometimes true

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a