Answer:

Step-by-step explanation:


We have to find


If 

=
Hence our answer is

Answer:
The solution of this expression is
and
.
Step-by-step explanation:
The procedure for solution of exercise A is described below:
1) We expand the expression.
2) The resulting expression is rearranged into the form of a second order polynomial.
3) Roots are found by Quadratic Formula.
Step 1:



Step 2:

Step 3:



The solution of this expression is
and
.
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