Question

show that -2√2 are the roots of the equation x^2+√2x-4=0​

Answer 1

Answer:

If -2√2 is root of eq x^2+√2x-4=0 then,

x^2+√2x-4=0

(-2√2) ^2+√2(-2√2) -4=0

8+(-4) -4=0

8-4-4=0

8-8=0

0=0

L. H. S=R.H.S

Hence, -2√2 is root of x^2+√2x-4=0.