SOLUTION: y-4/y^2-y-20
A) 0 and -5 B)0 and 5 C) 4 and -5 D) -4 and 5
Algebra.Com
Question 1006489: y-4/y^2-y-20
A) 0 and -5 B)0 and 5 C) 4 and -5 D) -4 and 5
Answer by ikleyn(52777) (Show Source): You can put this solution on YOUR website!
.
What is your question?
----------------------------------------------------------
Comment from student: Find the value of x that must be excluded in the algebraic fraction: y-4/y^2-y-20 — Thanks
----------------------------------------------------------
OK.
Let us consider the denominator of this function which is a quadratic polynomial p(x) = .
It can be factored as p(y) = (y-5)*(y+4).
It has the roots y = 5 and y = -4.
Hence, the domain of the given rational function is the entire number line except two points y = 5 and y = -4, where the function is not defined.
RELATED QUESTIONS
The (x,y) is the solution set to the system 2x-y=-4
(answered by Mathtut)
If (a^2 a^3)^x = a^125 and (a^y)^y = a^16/25 where x > 1 and y > 0, what is the product (answered by Fombitz)
5. What is an equation of the line in slope-intercept form?
m = 4 and the... (answered by ewatrrr)
Find the slope and y-intercept for the graph of 5x-4y=8
A. m=5/4;(0,10)
B.... (answered by jim_thompson5910,jojo14344)
Choose the equation that best represents a hyperbola with vertices (0, –1) and (4, –1),... (answered by Edwin McCravy,ewatrrr)
If x^2 + 7x - 8 = 0 ans y = x - 5, then what are the possible values of y?
(A)-8 and... (answered by Fombitz)
HELP PLEASE..
1. Find the sum.
[-8 -1 6] [-1 0 6]
[0 8 3] + [-2 6 (answered by richwmiller)
Find an ordered triple to represent
x in x = -6z + 1/4y if y = <2, 18, -4/5> and z =... (answered by Fombitz)
20. Write the equation of the line which has y-intercept (0, 5) and is perpendicular to... (answered by elima)