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how do you factor this?
Posted:
Oct 11, 2012 3:01 PM


Hi, I am teaching my daughter how to factor equations and came across an expression in a worksheet that looks like below:
1+a+b+c+ab+bc+ca+abc
The answer given (no work shown) shows (a+1)(b+1)(c+1) would be the factors. Sure enough, when I multiply all those terms, eventually, I get the above result. How do I go about deciphering how to group and factor the original equation above. Kinda confused. I was able to group them and factor somewhat, but could not get it down to the answer that is listed. Please help.
Thanks
s



