Divide
just flip the values at the bottom then multiply it
can you show me how
|dw:1338396312892:dw|goin to to be looking like this:
then what do yuo do
easy the opp of div is multiplication
can you show me again
@summerd are you here?
yesi am here
\[\large \frac{\frac{x^2+2x+1}{x-2}}{\frac{x^2-1}{x^2-4}}\] Now this division can be converted to multiplication by flipping the denominator \[\large \frac{x^2+2x+1}{x-2}\times {\frac{x^2-4}{x^2-1}}\] Do you get this?
ya then what do yuo do
@ash2326 what do you do next
Now let's factor each of the terms Do you know these? \[(a+b)^2=a^2+2ab+b^2\]\[(a^2-b^2)=(a+b)(a-b)\]
ya
Use these to factor the terms :)
can you show me how
\[\large \frac{x^2+2x+1}{x-2}\times {\frac{x^2-4}{x^2-1}}\] We notice that \[x^2+2x+1=(x+1)^2\] Do you agree with this?
yes i agree
and \[x^2-4=(x+2)(x-2)\] now factor the terms left if they could be factored and then post what do you get
so factor\[ x{2}-4\]
\[\large \frac{(x+1)^2}{x-2}\times {\frac{(x+2)(x-2)}{x^2-1}}\] now factor \(x^2-1\)?
how
Use the formula \[(a^2-b^2)=(a+b)(a-b)\] here we have \[x^2-1=x^2-1^2\]
and that is the answer oro can you simplify the x to the second
we'll get to the answer, could you factor this? x^2-1
how to you factor it
@summerd If we have the form \[(a^2-b^2)\ \text {We factor it as}\ (a+b)(a-b)\] Now you try factoring it?
|dw:1338398881808:dw|
Yeah you're right:D
so then what do we do
\[\large \frac{(x+1)^2}{x-2}\times {\frac{(x+2)(x-2)}{(x-1)(x+1)}}\] Can you simplify it by cancelling the common terms?
can you show me again
\[\large \frac{(x+1)^2}{\cancel {x-2}}\times {\frac{(x+2)\cancel{(x-2)}}{(x-1)(x+1)}}\] Now cancel other terms like this?
what else do you do can you show me it is hard to draw it
what else do you do can you show me it is hard to draw it
Ok don't draw, do you see any other common terms in numerator and denominator?
x+1
Yeah so we'll get \[\large {(x+1)^\cancel 2}\times {\frac{(x+2)}{(x-1)\cancel{(x+1)}}}\] Tell what's the answer? just type here, don't draw
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