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b) 28
c) 4
-1+1-1=-1
b) 2( -x + 4 ) dla x = - 10
2( -x + 4 ) =-2x+8=20+8=28
c) 1 - y + x dla x = 2 i y = - 1
1 - y + x =1+1+2=4
(-1)² + (-1)-1 = 1 -1 -1= -1
b) 2( -x + 4 ) dla x = - 10
2(10 +4)=20+8= 28
c) 1 - y + x dla x = 2 i y = - 1
1-(-1) +2= 1+1+2= 4