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Mathematics 20 Online
OpenStudy (anonymous):

-9x+3z-8y-x+12y+z-z+5y-11x

Directrix (directrix):

-21x + 9y + 3z

OpenStudy (anonymous):

-21x+9y+3z -3(7x-3y-z)

OpenStudy (ash2326):

We have \[-9x+3z-8y-x+12y+z-z+5y-11x\] Let's bring the like terms together \[-9x-x-11x-8y+12y+5y+3z+z-z\] \[x(-9-1-11)+y(-8+12+5)+z(3+1-1)\] now simplifying \[x(-21)+y(9)+z(3)\] we get \[-21x+9y+3z\] we can take a 3 out from each of the terms \[3(-7x+3y+z)\]

OpenStudy (anonymous):

ok so thats the final answer

OpenStudy (ash2326):

yeah nee nee

OpenStudy (anonymous):

is says it wrong

OpenStudy (ash2326):

nee you can also write like this \[-3(7x-3y-z)\]

Directrix (directrix):

Try -21x + 9y + 3z No instructions were given with the problem. However, I doubt you were expected to factor out the three.

OpenStudy (anonymous):

thank you all for ur help

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