If , find .
Correct Answer :
15
Solution :
The correct option is 15.
We are given the value of as:
We need to evaluate the expression .
Step 1: Calculate
Substitute into :
Using the algebraic identity , where and :
Step 2: Substitute into the given expression
Now, substitute the value of into :
The term cancels out:
Thus, the final answer is 15.
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