a). xdo potęgi 2 +x-1=dla x=-1
b). 2 (-x+4)fla x=-10
c).1-y+x dla x =2 i dla y=-1.
a)x=-1
x² +x-1=(-1)²+(-1)-1=1-1-1=-1
b)x=-10
2(-x+4)=-2x+8=-2*(-10)+8=20+8=28
c)x=2
y=-1
1-y+x=1-(-1)+2=1+1+2=4
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a)x=-1
x² +x-1=(-1)²+(-1)-1=1-1-1=-1
b)x=-10
2(-x+4)=-2x+8=-2*(-10)+8=20+8=28
c)x=2
y=-1
1-y+x=1-(-1)+2=1+1+2=4