(a-1)^2-(a+1)(a-2) (c+2)(c-3)-(c-1)^2 (y-4)(y+4)-(y-3)^2 (a-2)(a+4)-(a+1)^2...

Решите задачу:

$=a^2-2a+1-(a^2+a-2a-2)=a^2-2a+1-a^2+a+2= \\ -a+3 \\ (c+2)(c-3)-(c-1)^2=c^2+2c-3c-6-(c^2-2c+1)= \\ c^2-c-6-c^2+2c-1=c-7 \\ (y-4)(y+4)-(y-3)^2=y^2-16-(y^2-6y+9)= \\ y^2-16-y^2+6y-9=6y-25 \\ (a-2)(a+4)-(a+1)^2=a^2-2a+4a-8-(a^2+2a+1)= \\ a^2+2a-8-a^2-2a-1=-9 \\ (b-4)(b+4)-(b-1)^2=b^2-16-(b^2-2b+1)= \\ b^2-16-b^2+2b-1=2b-17$