for what values of x is the rational expression below undefined? x-7/x^2-7x-8
check all that apply
a. 1
b. 7
c. 8
d. -8
e. -7
f. -1

Question

01-03-2018
Mathematics

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for what values of x is the rational expression below undefined? x-7/x^2-7x-8
check all that apply
a. 1
b. 7
c. 8
d. -8
e. -7
f. -1

Respuesta :

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calculista calculista · Answer 1 · 2018-03-01T18:32:47+01:00

calculista calculista

01-03-2018

we have

f(x)=(x-7)/(x²-7x-8)

resolving the quadratic equation
using a graph tool-------- > see the attached figure
x=-1 x=8
therefore
(x-7)/(x²-7x-8)=(x-7)/[(x+1)*(x-8)

the answer is -1 and 8

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for what values of x is the rational expression below undefined? x-7/x^2-7x-8 check all that apply a. 1 b. 7 c. 8 d. -8 e. -7 f. -1

Respuesta :

Otras preguntas

for what values of x is the rational expression below undefined? x-7/x^2-7x-8
check all that apply
a. 1
b. 7
c. 8
d. -8
e. -7
f. -1