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OpenStudy (anonymous):
How to factorise x^2 + 6x + 9 - y^2
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OpenStudy (anonymous):
one sec
OpenStudy (anonymous):
\[(x-y+3) (x+y+3)\]
OpenStudy (anonymous):
x^2 + 6x + 9 - y^2=(x^2 + 6x + 9 )- y^2=(x^2 + 2*3*x + 9) - y^2=(x+3)^2 -y^2 =(x+3+y)(x+y-3)
OpenStudy (anonymous):
Isn't it supposed to be (x+3-y) (x-3+y)???
OpenStudy (anonymous):
(x−y+3)(x+y+3)?
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