Alright. I do not know the answer to this question, and need to know. If you were to expand (x-7)(x+7) there would be no x-term. Explain this! Please someone help!
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Originally Posted by Constance Alright. I do not know the answer to this question, and need to know. If you were to expand (x-7)(x+7) there would be no x-term. Explain this! Please someone help! There is an x term! FOIL. First, Outer, Inner Last. This gives us . This is a special expansion called the difference of squares.
I suppose you mean to expand this, there would be no x in the first order. This last one there is a theorem/rule which I don't know what is called in English. Which gives. There you have it, no x of first degree!
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