math
posted by sowmya .
b^416by b2
how to solve this problem?

(b^4  16)/(b2)
= (b^2 + 4)(b^2 4)/(b2) , difference of squares
= (b^2+4)(b+2)(b2)/(b2), difference of squares again on the second part of numerator
= (b^2 + 4)(b + 2)
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