Question 394860
Preform the indicated operations and then simplify z-4/z-5 - z+1/z+5 + z-15/z^2-25?
{{{((z-4)/(z-5)) - ((z+1)/(z+5)) + ((z-15))/(z^2-25))}}}
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LCD = (x^2-25)
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{{{(((z-4)(z+5)) - ((z+1)(z-5)) + (z-15))/(z^2-25))}}}
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{{{(z^2+z-20-z^2+4z+5+z-15)/(z^2-15)}}}
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{{{(6z-30)/((z+5)(z-5))}}}
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{{{(6(z-5))/((z+5)(z-5))}}}
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{{{(6(cross(z-5)))/((z+5)(cross(z-5)))}}}

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{{{6/(z+5)}}}
m.ananth@hotmail.ca