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

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

A 9

C 4

D 7

Solution

Correct Answer: Option A

x²+4x+13=1+x²

or, x²+4x+13-1-x²=0

or, 4x+12=0

or, x=-3

∴ x²=9