a) (2x −1) (x + 3)-1= 2x2 +1
-2(+3)-1=4+1
-2+3-1=+5
-1-1=+5
+7
b) 3(x + 4)2 -3(x-6) = 36
3(+4) (-1) (-6)=36
3+4-1-6=36
+7-7=36
0=36
36
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a) (2x −1) (x + 3)-1= 2x2 +1
-2(+3)-1=4+1
-2+3-1=+5
-1-1=+5
+7
b) 3(x + 4)2 -3(x-6) = 36
3(+4) (-1) (-6)=36
3+4-1-6=36
+7-7=36
0=36
36