Odpowiedzi

  • Użytkownik Zadane
2010-02-24T08:17:08+01:00
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
2010-02-24T08:26:14+01:00
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