SOLUTION: If a and b are constants, where is the zero of the function? {{{y = (x + a)/(x + b) }}}

Algebra ->  Rational-functions -> SOLUTION: If a and b are constants, where is the zero of the function? {{{y = (x + a)/(x + b) }}}      Log On


   

Question 879614: If a and b are constants, where is the zero of the function?
y+=+%28x+%2B+a%29%2F%28x+%2B+b%29+
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Plug in y+=+0 and solve for x.


y+=+%28x+%2B+a%29%2F%28x+%2B+b%29+


0+=+%28x+%2B+a%29%2F%28x+%2B+b%29+


0%28x+%2B+b%29+=+x+%2B+a+


0+=+x+%2B+a+


x+%2B+a+=+0


x+=+-a


So the root or zero of the function is x+=+-a