Question

x2 + b +12
If b is -7, the expression is unfactorable?
true or false

Answer 1

Answer: The answer is:  "False" ;  

                since the expression IS, in fact, "factorable."

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Step-by-step explanation:

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x² + (-7) + 12 =

x² - 7 + 12 ;  

What factors of "12" (that is: "+12") ;

add up to "-7" ?      -4, -3 ;   -4 * -3 = +12 ;

                                              -4 + (-3) = -4 - 3 = -7 ;

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So, we can factor the expression:  (x - 4) (x -3) ;  

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The answer is: "False" ; since the expression IS, in fact, "factorable."

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