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shannonaaa
 3 years ago
Factor: x2  9x + 12
shannonaaa
 3 years ago
Factor: x2  9x + 12

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Study23
 3 years ago
Best ResponseYou've already chosen the best response.2Well, the outer terms have to equal 12. The inner terms have to add to equal 9. What options do you have?

shannonaaa
 3 years ago
Best ResponseYou've already chosen the best response.0A. (x + 1)(x  12) B. (x + 2)(x + 6) C. (x  2)(x  6) D. prime

Study23
 3 years ago
Best ResponseYou've already chosen the best response.2It's prime. None of the other options produce 9x when the inside and outside terms are added together.... Does that make sense to you?

UnkleRhaukus
 3 years ago
Best ResponseYou've already chosen the best response.0\[(x + 1)(x  12)=x^211x12\neq x^2  9x + 12\] \[(x + 2)(x + 6)=x^2+8x+12\neq x^2  9x + 12\] \[(x  2)(x  6)=x^28x+12\neq x^2  9x + 12\]

Nancy_Lam
 3 years ago
Best ResponseYou've already chosen the best response.0\[x=\frac{b^2\pm \sqrt{b^24ac}}{2a}\]a=1, b= 9 , c=12
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