Объяснение:
6(3х²-2)-2(х-5)(х+5)-(х+1)²=
=18х²-12-2(х²-25)-(х²+2х+1)=
=18х²-12-2х²+50-х²-2х-1=
=15х²-2х+37
15x²-2x+37
Объяснение:
6(3х²-2)-2(х-5)(х+5)-(х+1)²=18х²-12-2(х²-25)-(х²+2х+1)=18х²-12-2x(x+5)+10(x+5)-1(x+1)²=18х²-12-2x²-10x+10(x+5)-1(x+1)²=18х²-12-2x²-10x+10x+50-1(x+1)²=18х²-12-2x²+50-1(x+1)²=18х²-12-2x²+50-1(x+1)(x-1)=18х²-12-2x²+50-1(x(x+1)+1(x+1))=18х²-12-2x²+50-1(x²+x+1(x+1))=18х²-12-2x²+50-1(x²+x+x+1)=18х²-12-2x²+50-1(x²+2x+1)=18х²-12-2x²+50-x²-2x-1=18x²+37-2x²-x²-2x=15x²+37-2x=15x²-2x+37
