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OpenStudy (anonymous):
can you simplify x^2-1 to x(x-1) it seems wrong to me because is you reverse it you'd get x^2-x
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Nnesha (nnesha):
apply difference of square method which is \[\huge\rm a^2 -b^2 =(a+b)(a-b)\]
Nnesha (nnesha):
x^2 -1 can't be x(x-1) x is not common
OpenStudy (anonymous):
okay thank you
Nnesha (nnesha):
np :) so how would you simplify x^2 -1 ?
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