SOLUTION: b is the midpoint of ac. prove ab + cd = ab

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Question 317280: b is the midpoint of ac. prove ab + cd = ab
Found 2 solutions by JBarnum, Fombitz:
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
this doesnt make much since seeing how we dont know where d is and the only way to make it =ab is for cd=0 ?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Check your equation.
ab%2Bcd=ab
only when cd=0 since ab=ab.