a^2 - 2a + 1 /2 from a ^2 + 2a - 1 / 2

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- December 22nd 2009, 12:47 AMumamath
a^2 - 2a + 1 /2 from a ^2 + 2a - 1 / 2

- December 22nd 2009, 01:48 AMmr fantastic
- December 22nd 2009, 03:25 AMUnenlightened
I'm guessing

You put all the s together, all the parts with just together, and then all numbers with no together.

So you have

= 0

= -4a

= 1

altogether giving

- December 22nd 2009, 04:38 AMHallsofIvy
But he might well mean . That would be and I will leave it to the OP to reduce that.