Question 657285: can you please help me with the follwing Quadratic Questions.
2x^-12x+17
giving the answer in surd form.
Minimum value of 2x^+8x+7
Thank you
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Quadratic Questions.
2x^-12x+17
Use the Quadratic Formula:
x = [12 +- sqrt(144 - 4*2*-17)]/(4
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x = [12 +- sqrt(180)]/4
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x = [12 +- 6sqrt(5)]/4
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x = 3 +- (3/2)sqrt(5)
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Minimum value of 2x^+8x+7
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Min occurs when x = -b/2a - -8/4 = -2
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f(-2) = 2(4)+8(-2)+7 = -1
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Min at (-2,-1)
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Cheers,
Stan H.
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