Question

x}^{2} - 9 \sqrt{2x - 4} " alt=" {x}^{2} - 9 \sqrt{2x - 4} " align="absmiddle" class="latex-formula">
for which value of x is this expression undefined?​

Answer 1

Answer:

When $x$

Step-by-step explanation:

When $x$ is smaller than $2$, the resulting value under the square root will become negative. Since it is impossible to take the root of a negative number, the expression is thus undefined, however, it can be represented with the imaginary number $i$ where $i$ = $\sqrt{-1}$.

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