1.xy-8a-xy+10a-c= 2.a²+b²+c²+d²= 3.2ab-4ab+c²-20c²-k= 4.-2(-4)-10+2= 5.-18:(-2)+12-3(4+d)= 6.-30:(-5)+2-d+d= 7.-10(-2)+5= 8.8a²* a*b*b*c= 9.2d*a*10*b*a= 10.5*d*a*a*b*a*b*5= 11.5x+2x²-5= 12.3y²-3y+3= 13.8k²-2k+1= *- znak mnożenia

1.xy-8a-xy+10a-c=2a-c 2.a²+b²+c²+d²=(a+b+c+d)² 3.2ab-4ab+c²-20c²-k=-2ab-19c²-k 4.-2(-4)-10+2=-14 5.-18:(-2)+12-3(4+d)=9+12-7-3d=14-3d 6.-30:(-5)+2-d+d=8 7.-10(-2)+5=-7 8.8a²* a*b*b*c=8a³b²c 9.2d*a*10*b*a=20dba² 10.5*d*a*a*b*a*b*5=25da³b² 11.5x+2x²-5=2x²+5x-5=x(2x+5)-5 12.3y²-3y+3=3(y²-y+1)=3y(y-1)+1 Δ=1-4=-3 nie ma pierwiastków 13.8k²-2k+1= 2k(4k-1)+1

xy-8a-xy+10a-c=2a-c a²+b²+c²+d²=(a+b+c+d)² 2ab-4ab+c²-20c²-k=-2ab-19c²-k -2(-4)-10+2=-14 -18:(-2)+12-3(4+d)=9+12-7-3d=14-3d -30:(-5)+2-d+d=8 -10(-2)+5=-7 8a²* a*b*b*c=8a³b²c 2d*a*10*b*a=20dba² 5*d*a*a*b*a*b*5=25da³b² 5x+2x²-5=2x²+5x-5=x(2x+5)-5 3y²-3y+3=3(y²-y+1)=3y(y-1)+1 pierwiastek=1-4=-3 8k²-2k+1= 2k(4k-1)+1