Question

a⁴+b⁴+c⁴+a²b²=2c²(a²+b²)​

Answer 1

$Answer ⤵️$

=a4+b4+c4=2c2(a2+b2)

=a+b+c-2ac-2bc=0

add 2ab on both sides,we get

=a+b+c+2ab-2bc-2ca=2ab,

=(a+b-c)=2ab

multiply and divide with 2 on RHS of the equation.