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
(1 point)
Responses
Step 1
Step 1
Step 2
Step 2
Step 3
Step 3
No mistake was made.
No mistake was made.
Step 3 contains an error. The equation should be: 12+17x+x^2=12-4x^2+17x.
The error occurs in Step 2. The terms "4x2" and "-4x2" are not correctly combined. The correct step would be:
Step 2: 8 + 4 + 17x + x2 - x2 = 10 + 2 + 10x + 7x.