Ответ:
=6×4-2х×(х+1)=
24-2х×(х+1)=
2(12-х×(х+1)=2(12-х²-х)=
2(-х²-х+12)=
2(-х²+3х-4х+12)=
2(-х×(х-3)-4(х-3))=
2×(-(х-3)×(х+4))=
-2(х-3)×(х+4).
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Ответ:
=6×4-2х×(х+1)=
24-2х×(х+1)=
2(12-х×(х+1)=2(12-х²-х)=
2(-х²-х+12)=
2(-х²+3х-4х+12)=
2(-х×(х-3)-4(х-3))=
2×(-(х-3)×(х+4))=
-2(х-3)×(х+4).