Hello!
In order to find the excluded values of the given expression, first, we need to find when the denominator is equal to zero, which causes the expression to be undefined.
7x + 2 = 0 (subtract 2 from both sides)
7x = -2 (divide both sides by 7)
x = -2/7
Therefore, the excluded values of the given expression is choice B, x = -2/7.