rozłóz na czynniki:b^4-11b^2+10
b^4 - 11b^2 + 10 = b^4 - 10b^2 - b^2 + 10 = b²(b² - 10) - (b² - 10) = (b² - 10)(b² - 1)
= (b - √10)(b + √10)(b - 1)(b +1)
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b^4 - 11b^2 + 10 = b^4 - 10b^2 - b^2 + 10 = b²(b² - 10) - (b² - 10) = (b² - 10)(b² - 1)
= (b - √10)(b + √10)(b - 1)(b +1)