Question

Get a Metal!!

Evaluate the expression described below if the number is 4.

The difference between a number squared and the number.

A.
0
B.
4
C.
12
D.
20

Answer 1

So, first you need to write the algebraic expression for "The difference between a number squared and the number". We know it will be subtraction because it says "the difference", a key term to represent subtraction. The algebraic expression should be, x^2-x.

Answer 2

Now, if you know x(our number) is 4, just plug in 4 wherever x is.
4^2=16
16-4=12
Therefore, your answer is C) 12.