a^2 - 2a + 1 /2 from a ^2 + 2a - 1 / 2
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Originally Posted by uma a^2 - 2a + 1 /2 from a ^2 + 2a - 1 / 2 It would help if you said what is meant to be done with these two expressions.
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
But he might well mean . That would be and I will leave it to the OP to reduce that.
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