Multiply and simplify if possible.

The simplest expression for the given expression is [tex]\sqrt{7}x-49\sqrt{x}[/tex].
Mathematically, multiplication implies the product of two numbers. Example, [tex]a\times b=c[/tex].
The given expression is, [tex]\sqrt{7x}(\sqrt{x}-7\sqrt{7})[/tex]
Simplify the given expression by multiplying the terms-
[tex]\sqrt{7x}(\sqrt{x}-7\sqrt{7})=\sqrt{7}x-49\sqrt{x}[/tex]
Thus, the simplest expression for the given expression is [tex]\sqrt{7}x-49\sqrt{x}[/tex].
Learn more about expressions here- https://brainly.com/question/14083225
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