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Orlov [11]
2 years ago
13

Solve the following quadratic by completing the square.

Mathematics
1 answer:
lianna [129]2 years ago
4 0

Answer:

x  = -5 \pm  \sqrt{26}

Step-by-step explanation:

x^2+10x-1=0\\\\\implies x^2+2\cdot 5 x +5^2-5^2-1=0\\\\\implies (x+5)^2-25-1=0\\\\\implies (x+5)^2 -26=0\\\\\implies (x+5)^2 = 26\\\\\implies x +5 = \pm\sqrt{26}\\\\\implies x  = -5 \pm  \sqrt{26}

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5blocks=6mins
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18/5 × 6= 21.6 = 21mins

5 0
3 years ago
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Determine the domain of the function f(x)=sqrt of x+3/(x+8)(x-2)
Karo-lina-s [1.5K]
Unclear.  Did you mean


<span>f(x)= [sqrt of x+3]
       --------------------
          (x+8)

or did you mean
                               3
</span><span>f(x)= [sqrt of x] + ----------
                              x+8


I will focus on the first possibility.  The domain of sqrt(x+3) is [-3,infinity).
The domain of    x+3
                          ------- is   "x is not equal to -8."
                            x+8

Then the overall domain would be simply [-3, infinity).
</span>
7 0
3 years ago
PLZ HURRY IT'S URGENT!!
belka [17]
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5 0
3 years ago
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If C(x) is the total cost incurred in producing x units of a certain commodity, then the average cost of producing x units of th
nataly862011 [7]

Answer:

x  =  2000 cameras

Step-by-step explanation:

C(x)     Total cost in producing  x units

C- = C(x) /x   Average cost of producing x units    x > 0

Cannon Precision Instrument

C (x)   Total monthly cost for producing x units of M1 cameras

is    C(x)  =  0.0025x²  + 80x  +  10000

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Taking derivatives on both sides of the equation

C-´(x)   =  0.0025   -  10000/x²

Then

C-´(x)   = 0

( 0.0025x² - 10000 ) / x²   =  0

0.0025x² - 10000 =  0

x²  =  10000 /0.0025         x²  = 4000000

x  =  2000 cameras

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3 years ago
Describe the value of the 9 in 926,415.
NeTakaya
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