Your friend, Margret, needs your help in solving a math problem that she got from her math teacher. This was the problem:

What number can be put where the question mark is?
Justify your answer.
? =

We need to put x = -4 where the question mark lies.

Step-by-step explanation:

Given the expression

First, solve the left-hand side of the equation

Thus, the expression becomes

So we have to put the number which can make the right-hand side of the equation equal to 1.

Let's put x = 4 where the question mark lies and solve the equation to check whether the right-hand side of the equation becomes 1.

Thus, both equations become equal when we put x = -4 on the question mark.

Therefore, we need to put x = -4 where the question mark lies.

dont understand

step-by-step explanation: