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Mathematics 9 Online
OpenStudy (anonymous):

x^2 - 36 / x - 6

OpenStudy (anonymous):

whr r u stuck

OpenStudy (anonymous):

x – 6, with the restriction x ≠ –6 x – 6, with the restriction x ≠ 6 x + 6, with the restriction x ≠ 6 x + 6, with the restriction x ≠ –6

jimthompson5910 (jim_thompson5910):

Hint: Factor x^2 - 36 to get (x+6)(x-6)

jimthompson5910 (jim_thompson5910):

Use the difference of squares rule to factor

OpenStudy (anonymous):

D?

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

The x-6 terms do cancel to give x+6 So the first part is x+6

jimthompson5910 (jim_thompson5910):

but the restriction is not x ≠ –6 since x = -6 actually works (x^2 - 36)/(x-6) ((-6)^2 - 36)/(-6-6) (36 - 36)/(-12) 0 So (x^2 - 36)/(x-6) = 0 when x = -6

OpenStudy (anonymous):

so B?

jimthompson5910 (jim_thompson5910):

no, B has x-6 when it should be x+6

OpenStudy (anonymous):

\[{\frac {{x}^{2}-36}{x-6}}\] you mean this?

OpenStudy (anonymous):

Oh okay! I see now, I think lol... It seems like it would be C then

jimthompson5910 (jim_thompson5910):

it is C

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