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Mathematics 15 Online
OpenStudy (anonymous):

Simplify. How and Why? ->

OpenStudy (anonymous):

?

OpenStudy (anonymous):

OpenStudy (anonymous):

there :)

OpenStudy (dan815):

okay when u see division 1/2 / 2/3 = 1/2*3/2

OpenStudy (dan815):

so do the flippy thing on your picture

OpenStudy (anonymous):

could i use synthetic division here?

OpenStudy (kenljw):

(1+3/x)(x-2)4/[(x^2-4)(x^2+5x+6) preformed division 4(x+3)(x-2)/[x(x^2-4)(x+3)(x+2) common denominator and factor 4(x+3)(x-2)/[x(x-2)(x+2)(x+3)(x+2) factored again 4/[x(x+2)^2} from this you see vertical asymptote at 0 and -2 there vertical asymptote because y is undefined at these points

OpenStudy (kenljw):

assuming you set equal to y

OpenStudy (anonymous):

\[(1 + {3\over x})({x-2\over x^2 + 5x +6}) \div ({ x^2-4 \over4}) \]First let's look at the right hand part. Let's multiply through so we have one single big term. First factor the quadratic and then multiply out.\[(1 + {3\over x})({x-2\over (x+2)(x+3)})\]\[({x-2\over (x+2)(x+3)}) + ({3(x-2)\over x(x+2)(x+3)})\]Now divide the add them together by modifying the right hand term with x/x\[({x(x-2)\over x(x+2)(x+3)}) + ({3(x-2)\over x(x+2)(x+3)})\]Now the denominators are the same, so we can add them. \[ {x(x-2)+3(x-2)\over x(x+2)(x+3)}\]Noticing the common factor in the numerator (x-2) we can rewrite as\[ {(x+3)(x-2)\over x(x+2)(x+3)}\]Cancel\[ {\cancel{(x+3)}(x-2)\over x(x+2)\cancel{(x+3)}}\]Leaving\[ {(x-2)\over x(x+2)}\]All that is left is the division bit. \[ {(x-2)\over x(x+2)} \div ({ x^2-4 \over4})\]which can be rewritten as\[ {(x-2)\over x(x+2)} \times ({ 4 \over x^2-4})\]\[ {(x-2)\over x(x+2)} \times ({ 4 \over (x+2)(x-2)})\]\[ {\cancel{(x-2)}\over x(x+2)} \times ({ 4 \over (x+2)\cancel{(x-2)}})\]Leaving \[4\over x(x+2)^2\]

OpenStudy (anonymous):

Hope that helps :)

OpenStudy (kenljw):

checks

OpenStudy (anonymous):

woops, didn't realise it was already done, sorry

OpenStudy (kenljw):

nice to have a check!!!

OpenStudy (anonymous):

@karenangelahernandez do you get it?

OpenStudy (kenljw):

apparently, she gave me metals

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