Which step contains an error using the Commutative Property of Addition in verifying 8+x2+17x−x2+4=10+4x2+10x−4x2+2+7x?
Step 1: 8+4+x2−x2+17x=10+2+10x−4x2+7x +4x2
Step 2: 8+4+17x+x2−x2=10+2+4x2−4x2+10x+7x
Step 3: 12+17x+x2=12−x2+17x
There is no error in using the Commutative Property of Addition in this problem.
In Step 2, there is an error using the Commutative Property of Addition. The correct step using the Commutative Property of Addition would be:
Step 2: 8+4+17x+x2−x2=10+2+10x−4x2+7x