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Zigmanuir [339]
3 years ago
8

F(x) = 14 - 0.5 f(30) =

Mathematics
2 answers:
Tasya [4]3 years ago
5 0

The Answer is actually -1

serg [7]3 years ago
4 0

Answer:

13.5

Step-by-step explanation:

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Solve by completing the square<br><br>x squared +14x - 51=0
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x^2 +14x - 51=0\\ \\\Delta = b^{2}-4ac =14^{2}-4*1*(-51)=196+204=400 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{-14- \sqrt{400}}{2}=\frac{-14-20}{2}= \frac{-34}{2}=-17\\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{-14+ \sqrt{400}}{2}=\frac{-14+20}{2}= \frac{6}{2}=3


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4 years ago
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yuradex [85]

Answer:

Step-by-step explanation:

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Step-by-step explanation:

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