Question

Select all the equations that are true when x is -4.

-8 = 2x
-12 = x• -3
- 12 = x+x+x
x + 4 = -8
x2=-16

Answer 1

-8=2x and -12=x+x+x

Explanation:

When x is -4

1). 2(-4) = -8

2). -4.-3= 12

3). (-4)+(-4)+(-4)= -12

4). -4+4= 0

5). -4²= -16

• For the last equation, if the -4² was in a bracket then the answer would be 16 because (-²) would give +

Answer 2

-8=2(-4) is true
-12=-4(-3) is false
-12=-4-4-4 is true
-4+4=-8 is false
-4(2)=-16 is false

First and third equations are true when x is -4