Question

For quadratic equation `2x + 5/x = 5` :

विकल्प

• x ≠ 0

• x = 1

• x = 5

• x = 2

Answer 1

x ≠ 0

Explanation:

Given quadratic equation be

`2x + 5/x = 5`  ...(1)

For x = 1;

L.H.S = `2 xx 1 + 5/1`

= 2 + 5

= 7 ≠ 5 = R.H.S

For x = 5;

L.H.S = `2 xx 5 + 5/5`

= 10 + 1

= 11 ≠ 5 = R.H.S

For x = 2;

L.H.S = `2 xx 2 + 5/2`

= `4 + 5/2`

= `(8 + 5)/2`

= `13/2`≠ R.H.S

∴ x ≠ 0   ...[For x = 0, given equation is not defined]