If x2+ 4x + 13 = 1 + x2, then find out the value of x2?
A
9
B
4
C
7
Correct Answer: 9
Here, x2 + 4x + 13 = 1 + x2 or, x2 - x2 + 4x = 1 - 13 or, 4x = - 12 or, x = - 3 So, x2 = ( - 3)2 = 9