How do you simplify and find the excluded values of 5/(7z+5)?

1 Answer
Jim G.
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"

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