Odpowiedzi

2010-01-28T16:49:24+01:00
A) x^2-x=7^2-7=49-7=42
b) a^2-3a+1=-4^2-3*(-4)+1=-16-12+1=-27
c) 1+x(x+4)=1-11(-11+4)=1-121-44=-164
d) x-2y=1-2*(-1)=1-2=-1
e) 2x^2-y(x+1)=2*-2^2-5(-2+1)=-16+10-1=-7
f) (m+1)(n-2)=(2+1)(1-2)=2-4+1-2=-3
2010-01-28T16:55:26+01:00

c) 1+(-11)(-11+4) = 1+121-44 = 122-44=78
d) 1 - 2*(-1) = 1 - 2 = -1
e)2*(-2) * 2-5(-2+1)=-4*2 - 5- (-1)= 8 - 5 + 1 = 8-6=2