State the restrictions and simplify: 1/x^2 + 1/x-2
\[\frac{ 1 }{ ^{x2} } + \frac{ 1 }{ x-2 }\]
Restriction: x must not =2.
To simplify, begin by combining the two terms. Hint: use the least common multiple as the denominator.
@jim_thompson5910 got another for ya
|dw:1347766316760:dw|
@allank
@jim_thompson5910
is it x-2 or x+2?
x-2
sorry my drawing I put x+2 in error
First, what do you think is the limitation for this?
that's ok
\[\Large \frac{ 1 }{ x^{2} } + \frac{ 1 }{ x-2 }\] \[\Large \frac{ 1(x-2) }{ x^{2}(x-2) } + \frac{ 1 }{ x-2 }\] \[\Large \frac{ x-2 }{ x^{2}(x-2) } + \frac{ 1 }{ x-2 }\] \[\Large \frac{ x-2 }{ x^{2}(x-2) } + \frac{ 1*x^{2} }{ x^{2}(x-2) }\] \[\Large \frac{ x-2 }{ x^{2}(x-2) } + \frac{ x^{2} }{ x^{2}(x-2) }\] \[\Large \frac{ x-2 + x^{2} }{ x^{2}(x-2) }\] \[\Large \frac{ x^{2} + x-2 }{ x^{2}(x-2) }\] =================================================================================== So \[\Large \frac{ 1 }{ x^{2} } + \frac{ 1 }{ x-2 }\] simplifies to \[\Large \frac{ x^{2} + x-2 }{ x^{2}(x-2) }\]
We're following the same idea as last time. The big difference this time we're adding instead of subtracting the fractions.
@jim_thompson5910 that is what I had but I was not seeing the bigger picture. I needed to rearrange it for x^2 to x to -2 so I can then factor it out. Ugg
you can factor x^2 + x - 2 to get (x+2)(x-1), but this is optional in my opinion
@jim_thompson5910 I really appreciate your help
yw, glad to be of help again
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