1.(X⒉+X+1)*(X⒉+X+2)-12=2.XY-1+X-Y=3.a⒊+3a⒉+3a+9=4.6X⒉-7XY-3Y⒉-X+7Y-2=
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1.(X⒉+X+1)*(X⒉+X+2)-12=2.XY-1+X-Y=3.a⒊+3a⒉+3a+9=4.6X⒉-7XY-3Y⒉-X+7Y-2=
1.(X⒉+X+1)*(X⒉+X+2)-12=
2.XY-1+X-Y=
3.a⒊+3a⒉+3a+9=
4.6X⒉-7XY-3Y⒉-X+7Y-2=
1.(X⒉+X+1)*(X⒉+X+2)-12=2.XY-1+X-Y=3.a⒊+3a⒉+3a+9=4.6X⒉-7XY-3Y⒉-X+7Y-2=
1,(X⒉+X+1)^2+(X⒉+X+2)-12=(X⒉+X+1+4)(X⒉+X-2)=(X⒉+X+5)(X+2)(X-1)
2,XY-1+X-Y=(X-1)(Y+1)
3,(a^2+3)(a+3)
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