The expression that is not a rational expression is:
[tex]\frac{(x + 3)(2x - 1)}{x + 3}[/tex]
A rational expression is an expression that has a variable in the denominator.
For expression [tex]\frac{(x + 3)(2x - 1)}{x + 3}[/tex], x + 3 is a common term to the numerator and denominator, hence it is simplified to 2x - 1 and is not a rational expression.
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The option that is not a rational expression is [tex]\frac{3x + 4\sqrt{x} -7}{2x+2}[/tex]
Rational expression are fraction whose numerator and denominator are polynomials.
In other words, rational expression is the ratio of two polynomials.
Therefore, an example of a ration expression is as follows:
[tex]\frac{x^{2}+9 }{x + 1}[/tex]
Therefore, the option that is not a rational expression is as follows;
[tex]\frac{3x + 4\sqrt{x} -7}{2x+2}[/tex]
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