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Why would "-7" in the expression (x^2+3)-(x-7) become positive?

(This is a genuine question not a test one) ​

Respuesta :

Fuqualeah971
You would use the distributive property with the negative. So the second x becomes negative, but since the 7 is already negative it becomes positive. Think of it as if you put the two dashes together you can make a plus sign.

Answer:

x is the variable that's representing a number so -7 would not become posting

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