Question

Is $\sqrt{x}=4$ a linear equation?

If not, then how can the equation be made linear? (where $x\ge 0$)

• A. Yes
• B. No, substitute $x=u^2$, now the equation is linear in variable x
• C. No, substitute $x=u^2$, now the equation is linear in variable u
• D. None of these.

Answer 1

The correct option is C No, substitute $x=u^2$, now the equation is linear in variable u

The equation is not linear. We will substitute
$x=u^2$
Now the equation is u = 4 which is linear equation.