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WITCHER [35]
3 years ago
12

What value of c makes the polynomial below a perfect square?

Mathematics
2 answers:
schepotkina [342]3 years ago
7 0
81/4
Because I found the answer by using a Calculator I found online
malfutka [58]3 years ago
6 0

Answer:

B

Step-by-step explanation:

x² + 9x

to complete the square

add ( half the coefficient of the x- term )² to x² + 9x

= x² + 2(\frac{9}{2} )x + (\frac{9}{2} )²

= x² + 9x + \frac{81}{4} ← the value of c

= (x + \frac{9}{2} )² ← a perfect square

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\bf ~~y=\stackrel{slope}{-\cfrac{2}{3}}x+\cfrac{1}{3}~~ has a slope of -2/3.


so we're really looking for a line whose slope is -2/3 and runs through 9,4.


\bf (\stackrel{x_1}{9}~,~\stackrel{y_1}{4})~\hspace{10em}slope =  m\implies -\cfrac{2}{3}\\\\\\\stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-4=-\cfrac{2}{3}(x-9)\\\\\\y-4=-\cfrac{2}{3}x+6\implies y=-\cfrac{2}{3}x+10

8 0
3 years ago
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Step-by-step explanation:

x + 5(x + 2)​

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6x+10

Let x = 9

6(9) +10

54+10

64

8 0
3 years ago
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Write a function whose graph passes through : (-7,0), (2,0), (4,0)<br> The function is f(x)=______
strojnjashka [21]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
A long distance runner ran 4x4x4x4x4x4 miles last year. How many miles is this?
Archy [21]

Answer:

4096

Step-by-step explanation:

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Group them to multiply to make it easier:

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3 years ago
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Vesna [10]

Answer:

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Step-by-step explanation:

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Hence. Comparing their respective averages,

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0.330 > 0.326

Hence, Miguel Cabrera's batting average is higher than that of Mike trout

8 0
3 years ago
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