Answer :
The expression is equivalent to the expression, 7x sqrt 2 - 2 sqrt 2, the correct option is A.
What is an Expression?
An expression is a mathematical statement which consists of variables, constants and mathematical operators.
The expression is
[tex]\rm 5x \sqrt 2 - 2 \sqrt 2 + 2x \sqrt 2\\\\[/tex]
It can be simplified as
[tex]\rm 7x\sqrt 2 -2\sqrt2[/tex]
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