-12b^4+15b^5+9b^3+12b^4-8b^3+12b^2=15b^5+17b^3+12b^2
Ответ:
=-12b⁴+15b⁵+9b³+12b⁴-8b³+12b²=15b⁵+b³+12b²=b²(15b³+b+12)
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-12b^4+15b^5+9b^3+12b^4-8b^3+12b^2=15b^5+17b^3+12b^2
Ответ:
=-12b⁴+15b⁵+9b³+12b⁴-8b³+12b²=15b⁵+b³+12b²=b²(15b³+b+12)