Question

Evaluate 2x−2 for (a) x=−2 and (b) x=3. Write your answers in simplest form.

Answer 1

(a) x = -2

Plug in -2 for x in the equation:

2(-2) - 2

Note that when you multiply a negative number and a positive number, the product will be a negative. Also, remember to follow PEMDAS. First, multiply:

2 * -2 = -4

Next, subtract:

-4 - 2 = -6

When x = -2, your answer is -6.

(b) x = 3

Plug in 3 for x in the equation:

2(3) - 2

Remember to follow PEMDAS. First, multiply:

2 * 3 = 6

Next, subtract:

6 - 2 = 4

When x = 3, your answer is 4.

~