shahar
Full Member
- Joined
- Jul 19, 2018
- Messages
- 496
Can I say the two expressions are equal 0, because square expression cannot be negative.
And from there we assume that the expression are equal to zero.
And:
when the expression 2x-1 = 0 the second expression doesn't equal to zero, and from there x = 1/2 and 2 + 1/2 = 21/2 that isn't zero.
Q.E.D. (quod erat demonstrandum)