-4а + 12 - а + 2 + (2а²+8а-а-4) =
= -5а + 14 + 2а² + 7а - 4 =
= 2а² + 2а + 10 =
= 2 * (а²+а+5)
Ответ:
-4(а-3)-(а-2)+(2а-1)(а+4)=
-4а+12-а+2+2а^2 +8а-а-4=
2а^2 +2а+10
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-4а + 12 - а + 2 + (2а²+8а-а-4) =
= -5а + 14 + 2а² + 7а - 4 =
= 2а² + 2а + 10 =
= 2 * (а²+а+5)
Ответ:
-4(а-3)-(а-2)+(2а-1)(а+4)=
-4а+12-а+2+2а^2 +8а-а-4=
2а^2 +2а+10