if x2+4x+13=1+x2, then find out the value of x2? 

A    9

B    0

C    4

D    7

Solution

Correct Answer: Option A

 

 x2+4x+13=1+x2

 x2+4x+13-1-x2=0

4x+12=0

x=-3

x2=9

 

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