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Mathematics 7 Online
OpenStudy (anonymous):

PARABOLAS

OpenStudy (anonymous):

OpenStudy (anonymous):

I'm getting confused from the middle part. How do they get 6 and 9 from combing like terms?

OpenStudy (misty1212):

HI!!

OpenStudy (misty1212):

from step two to step three was squaring

OpenStudy (anonymous):

(y-3)^2 is actually (y-3)(y-3)

OpenStudy (misty1212):

\[(y-3)^2=(y-3)(y-3)=y^2-3y-3y+9=y^2-6y+9\] for example

OpenStudy (anonymous):

THANK YOU! I'VE BEEN STUCK ON THIS LESSON FOR A WEEK!!!

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