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Mathematics 18 Online
OpenStudy (anonymous):

(x+4)^2-(x-1)^2 how would i write difference of squares?

OpenStudy (campbell_st):

distribute and then collect like terms... \[x^2 + 8x + 16 - x^2 +2x - 1 =\]

OpenStudy (anonymous):

would the answer be 7x+17? @campbell_st

OpenStudy (marissalovescats):

Actually I don't think that's how you do it.

OpenStudy (marissalovescats):

I got 10x+17. I think some of your math is wrong. Mine could be wrong but idk.

OpenStudy (marissalovescats):

x^2-x^2 is 0, 8x+2x is 10x and 16+1 is 17.

Directrix (directrix):

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