Answer:
The length for on side is 10.5.
Step-by-step explanation:
6.5 + 6.5 = 13
34 - 13 = 21
21 divided by 2 is 10.5
Length 10.5 + 10.5 + 6.5 + 6.5 = 34
U mean 4x-4^2=3^2 ? if u mean that the ans would be 6,25

Do the multiplication both sides,

Arrange the terms to LHS according to their variables,

Factorise this polynomial

So what we notice here is when you're multiplying two numbers you're getting 0 as answer.
So one of them must be 0.
If (x-1) is 0
then x = 1
similarly,
x-6=0
then, x= 6.
So the possible values of x are 1 and 6.
Answer is C
hope this helps!