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  • 14-04-2021
  • Mathematics
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Suppose f(x)=2x3+11x2 18x+9 has a zero at -3. What are the other solutions?

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1345578
1345578 1345578
  • 14-04-2021

Answer:   x ≓ 6.899067609

Step-by-step explanation:

Easy because:

(2 • (x3)) -  11x2) -  18x) -  9  = 0

(2x3 -  11x2) -  18x) -  9  = 0

2x3 - 11x2 - 18x - 9  = 0

2x3-11x2-18x-9 = 0

 F(x) = 2x3 - 11x2 - 18x - 9

At   x=   6.00   F(x)  is equal to  -81.00

At   x=   7.00   F(x)  is equal to  12.00  F(  6.899067609 ) is  -0.000000436  

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