Question

check weather the give value of x are the solution of equation or not x²-4root2+6=0 ,x=3root2,x=-root2​

Answer 1

x^2-4√2+6=0

put x=3√2

3√2^2-4√2+6=0

18-4√2+6=0

24-4√2=0

LHS IS NOT EQUAL TO RIGHT HAND SIDE SO THE VALUE OF X IS INCORRECT.

NOW PUT X=-√2

-√2^2-4√2+6=0

8-4√2=0

LHS IS NOT EQUAL TO RIGHT HAND SIDE SO THIS VALUE OF X IS ALSO INCORRECT .