Answer
FALSE.
The value of $u$ must be set to $\sqrt{x}$ to solve the equation.
$x - 9\sqrt{x} + 14 = 0$
$u^2 - 9u + 14 = 0$
Get the factors:
$(u-2)(u-7)=0$
$u-2=0$ or $u-7=0$
$u=2$ or $u=7$
Work Step by Step
FALSE.
The value of $u$ must be set to $\sqrt{x}$ to solve the equation.
$x - 9\sqrt{x} + 14 = 0$
$u^2 - 9u + 14 = 0$
Get the factors:
$(u-2)(u-7)=0$
$u-2=0$ or $u-7=0$
$u=2$ or $u=7$