Question

Сократите дробь:
8b - 8 - 2b^3 + 2b^2
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b^2 (b - 2) - 2b (b - 2) + b - 2

Answer 1

$= frac{8(b-1)-2 b^{2}(b-1) }{(b-2)( b^{2}-2b+1) } = frac{(8-2b^{2})(b-1) }{(b-2)(b-1)^{2} } = frac{2(4- b^{2}) }{(b-2)(b-1)} = frac{2(2-b)(2+b)}{(2-b)(1-b)} = frac{2(2+b)}{1-b}$