Math Is Fun Forum

CIV

Member

Registered: 2014-11-09

Posts: 74

Having trouble with this equation.

It's fairly simple but for the life of me I can't figure it out. What am I missing here. The last problem I was stuck on the method for solving was a lot simpler than what I was trying. I am thinking this one is the same.

This is as far as I'm got:

This is what I noticed:

But I can't do this this:

Because one of the binomials has an exponent of 3 and the other does not.

Last edited by CIV (2015-03-23 09:48:10)

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Having trouble with this equation.

The second line is incorrect, because

What you can do is write

as

and take out the common factor of

out of both terms.

Last edited by anonimnystefy (2015-03-23 13:06:14)

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