Hi Mark - I went to purplemath, but I'm still not getting the right answers. For example:

-x^2 - 3x + 28.

I first factor out the negative one, so I get -1(x^2 + 3x -28)

I then make my square

with x^2 in the top left, -4x in the top right, 7x in the bottom left, and -28 in the bottom right.

I then factor going left and up.

This will give me (x+7) (x-4), assuming that you take the the positive or negative sign from the number to the left or on top. The answer in the book, however, is (-x+4)(x+7). So, it looks like you apparently take part of my answer (x-4) and multiply it by -1. But how do you know which one to multiply it to? Do you actually have to work it out for the original

equation to see where the negative/positives must be once you have the factoring? I thought there was a way to know how to do this with the box method without have to then multiply everything out to find out where to "multiply" the -1. I just want to make sure I'm not doing the box method wrong. When the coefficient is positive, I get the answer right everytime. Have I missed some step, or do I actually need to multiply my answer from the box out to get the right answer?

Thank you so much for your help!

Suzanne

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