Question

Which number cannot be used in place of x in the following rational expression?

x+6/11x+1

Answer 1

The denominatro can't be zero. It is zero when 11x+1=0, i.e., when x=-1/11. So we can't use x=-1/11.

Answer 2

which number cannot be used in place of x in the following rational expression
x+7/x(2)-64
we cannot use x= or x=

Answer 3

Give it a try!. For which x we have \(x^2-64=0\) ?