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-1²-1-1=-2
b)2(-x+4) dla x=-10
2(-10+4)=
-12
c) 1-y +x dla x=2 i y=-1
1-1+2=2
a) x²+x-1 dla x=-1
= (-1)² - 1 - 1 = 1 - 2 = -1
b) 2(-x+4) dla x=-10
= 2(-(-10)+4) = 2(10+4) = 2*14 = 28
c) 1-y +x dla x=2 i y=-1
= 1+1+2 = 4