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VLD [36.1K]
3 years ago
12

5 (5) - -2 = ( worth 10 points)

Mathematics
2 answers:
scZoUnD [109]3 years ago
8 0
I think the answer is 27
Irina-Kira [14]3 years ago
7 0

Answer:

I think 27 is the answer

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A: What are the solutions to the quadratic equation x2+9=0? B: What is the factored form of the quadratic expression x2+9? Selec
Paraphin [41]

Answer:

A. The solutions are x=3i,\:x=-3i.

B. The factored form of the quadratic expression x^2+9=(x-3i)(x+3i)

Step-by-step explanation:

A. To find the solutions to the quadratic equation x^2+9=0 you must:

\mathrm{Subtract\:}9\mathrm{\:from\:both\:sides}\\\\x^2+9-9=0-9\\\\\mathrm{Simplify}\\\\x^2=-9\\\\\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}\\\\x=\sqrt{-9},\:x=-\sqrt{-9}

x=\sqrt{-9} = \sqrt{-1}\sqrt{9}=\sqrt{9}i=3i\\\\x=-\sqrt{-9}=-\sqrt{-1}\sqrt{9}=-\sqrt{9}i=-3i

The solutions are:

x=3i,\:x=-3i

B. Two expressions are equivalent to each other if they represent the same value no matter which values we choose for the variables.

To factor x^2+9:

First, multiply the constant in the polynomial by i^2 where i^2 is equal to -1.

x^2+9i^2

Since both terms are perfect squares, factor using the difference of squares formula

a^2-i^2=(a+i)(a-i)

x^2+9=x^2+9i^2=\left(-3i+x\right)\left(3i+x\right)

5 0
2 years ago
Tickets that cost $88 for a professional women’s championship soccer game are offered at a 15% discount. What is the sale price?
RoseWind [281]

Answer:

$74.80

Step-by-step explanation:

10% = 8.8

5% = 4.4

8.8 + 4.4 = 13.2

88 - 13.2 =$74.80

6 0
3 years ago
3.30, -√10, 17/5, √11 least to greatest
Vilka [71]

Answer:

-√10,√11 , 3.30, 17/5

Step-by-step explanation:

-√10,√11 , 3.30, 17/5

17/5 is 3.4

the 10 is a negative so its the smallest

11 square root is a imiganery

7 0
3 years ago
Read 2 more answers
The midpoint between x and 27 is -3. What is x?
Alex_Xolod [135]

Answer:

-33

Step-by-step explanation:

well you can use mid point formula and solve for x

or count how many it takes to get from -3 to 27 and add that to -3 the other direction

6 0
2 years ago
What is the inverse of the following function?
igomit [66]
If they are just looking for the “inverse” which means flip it it’ll be 5radical (which the the v shape looking bar) x-4 = h(x)
3 0
3 years ago
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