How do you simplify and find the excluded values of #5/(7z+5)#?
1 Answer
Aug 6, 2016
see explanation.
Explanation:
The given rational function is already in simplest form. The denominator cannot be factorised, which would allow cancelling and thus simplification.
The excluded value is the value of z that would make the denominator equal to zero.
That is
#5/0# as we cannot divide by zero, this would be undefined.To find the excluded value equate the denominator to zero and solve for z.
solve : 7z + 5 = 0
#rArr7z=-5rArrz=-5/7#
#rArrz=-5/7" is the excluded value"#
