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DarinKing2005
21.10.2019 •
Mathematics
The model represents a polynomial and its factors.
which equation is represented by the model?
x2 – 2x – 3 = (x – 3)(x + 1)
x2 – 4x + 3 = (x – 3)(x – 1)
x2 + 2x + 3 = (x + 3)(x – 1)
x2 + 4x – 3 = (x + 3)(x + 1)
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Ответ:
A.)
x^2-2x-3=(x-3)(x+1)
Use FOIL method.
First: (x)(x)=x^2
Outside: x(1)=x
Inside: -3(x)=-3x
Last: -3(1)=-3
You should end up with:
x^2+x-3x-3
Which then simplified is:
x^2-2x-3
So your answer is A.
Ответ: