8b³-(2b-1)²=13+12b²
8b³-(8b³-12b²+6b-1)=13+12b²
8b³-8b³+12b²-6b+1=13+12b²
-6x=12 |÷(-6)
x=-2.
Ответ: x=-2.
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8b³-(2b-1)²=13+12b²
8b³-(8b³-12b²+6b-1)=13+12b²
8b³-8b³+12b²-6b+1=13+12b²
-6x=12 |÷(-6)
x=-2.
Ответ: x=-2.