Question

Solve |2x - 5| = 4.
{x | x = -4.5 or x = 4.5}
{x | x = 0.5 or x = 4.5}
{x | 0.5 < x < 4.5}

Answer 1

try plugging in values to see if they fit or you can solve the equation

Answer 2

|2x - 5| = 4
means that
either 2x - 5 = 4 or 2x - 5 = -4

Answer 3

is the answer a?

Answer 4

no -4.5 is not a root

Answer 5

2x - 5 = -4
add 5 to both sides
2x = 1
x = 0.5

Answer 6

ooh, i see, so it has to be b?

Answer 7

or am i wrong?

Answer 8

yes
b

Answer 9

the first eqaution gives x = 4.5