SOLUTION: Good Morning, HELP!!! Factoring Trinomials and determine if it a prime if I must state it. -20 + 31x

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Question 1014014: Good Morning,
HELP!!! Factoring Trinomials and determine if it a prime if I must state it.
-20 + 31x - 12x^2

Thanking you in advance Betty
Found 3 solutions by fractalier, stanbon, Alan3354:
Answer by fractalier(6550)   (Show Source):
You can put this solution on YOUR website!
Rearranging we get
-12x^2 + 31x - 20 =
-(12x^2 - 31x + 20) =
Ask yourself, "Are there factors of 12*20 that add to 31?"
Yes, 15 and 16, and we get
-(3x - 4)(4x - 5)

Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website!
-20 + 31x - 12x^2
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-(12x^2 - 31x +20)
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discriminant:: b^2 - 4ac
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b^2 - 4ac = 31^2 - 4*12*20 = -479
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Since the discriminant is negative the zeroes of
this algebraic form are complex numbers.
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The Form is considered to be prime because is
has no Real Number zeroes.
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Cheers,
Stan H.
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Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website!
Factoring Trinomials and determine if it a prime if I must state it.
-20 + 31x - 12x^2 = (5 - 4x)*(-4 + 3x)
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SOLUTION: Good Morning, HELP!!! Factoring Trinomials and determine if it a prime if I must state it. -20 + 31x - 12x^2 Thanking you in advance Betty