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Mathematics 19 Online
Nicole:

http://prntscr.com/lw4yu3

Nicole:

@Vocaloid

Vocaloid:

rules for dividing fractions: switch the numerator and denominator on the second fraction then change the multiplication sign to a division sign after that you just need to factor out any integers and cancel terms when possible

Yinshy:

and this is why Vocaloid is at 100....

Nicole:

Im thinking A?

Vocaloid:

yeah good

Nicole:

http://prntscr.com/lwa7vn

Vocaloid:

same principle as last time, flip the second fraction, change division to multiplication, cancel out terms when applicable

Nicole:

D?

Nicole:

hmm

Vocaloid:

try taking the polynomials from D, factoring, and cancelling out terms

Nicole:

Im a bit confused

Vocaloid:

flip the second fraction from D, then factor for example, x^2 - 3x - 88 factors into (x-11)(x+8) which lets you cancel (x-11) from the numerator of the first fraction and the denominator of the second fraction

Nicole:

A?

Nicole:

wait LOL this is confusing me

Nicole:

im bad at factoring

Vocaloid:

to factor x^2 - 2x - 63 pick two numbers that multiply together to get -63 and add to -2

Nicole:

(x−9)(x+7)

Vocaloid:

good so putting everything together we have (x-11)(x+8) * (x-9)(x+7)


(x-11)(x+7)(x-7) notice you can cross out (x-11) and (x+7) and after that what's left will be your solution

Nicole:

so wouldnt it be C?

Vocaloid:

yup good

Nicole:

http://prntscr.com/lwabhm is this correct

Vocaloid:

yeah that's what i got too

Nicole:

http://prntscr.com/lwabuu

Vocaloid:

hm not quite if you multiply (m+1)/(m+4) by (m+2)/(m+2) you will make both denominators equal to (m^2+6m+8) so the fractions can be added

Nicole:

so B

Vocaloid:

check your math again (m+1)(m+2) + 5m + 10 = ?

Nicole:

Oh D

Vocaloid:

yes

Nicole:

http://prntscr.com/lwadcs

Vocaloid:

any ideas? as a hint try factoring (h^2-9)

Nicole:

(h+3)(h-3)

Nicole:

so b and c?

Vocaloid:

good

Nicole:

can you just check these pls http://prntscr.com/lwakio

Vocaloid:

yeah good

Nicole:

last ones http://prntscr.com/lwalky

Vocaloid:

yeah good

Nicole:

okay thanks

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