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PolarNik [594]
3 years ago
15

4x^2-2x-4=0 solve using quadratic formula

Mathematics
1 answer:
MArishka [77]3 years ago
4 0

Answer:

Step-by-step explanation:

Although you can start with 4x^2-2x-4=0, it's just slightly easier to reduce the coefficients.  4x^2-2x-4=0 becomes 2x^2 - x - 2 = 0.

The discriminant (part of the quadratic formula) is b^2 - 4ac.  Using b = -1. a = 1 and c = -2, we get (-1)^2 - 4(2)(-2), or 17.

                                                       -b ± √(b^2 - 4ac)

Then the quadratic formula   x = ---------------------------

                                                                 2a

                                         -(-1) ± √17           1 ± √17

takes on the values  x = -----------------  =  ---------------

                                                  4                      4

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If g(x) = x2 + 2, find g(3). (2 points) 9 8 11 6
Igoryamba

For this case we have a function of the form y = g (x)

Where:

g (x) = x ^ 2 + 2

We must find the value of the function when x = 3. Then we substitute:

g (3) = 3 ^ 2 + 2\\g (3) = 9 + 2\\g (3) = 11

Thus, the value of the function when x = 3 is y = 11

Answer:

g (3) = 11

Option C

7 0
3 years ago
Read 2 more answers
-4x -8y = -24 <br> y = -5x -6
Butoxors [25]
I would say this 7 because when you subtract
8 0
3 years ago
A queen size mattress has a catalog price of $428.99. The trade-discount rate is 20%. What is the net price to the nearest cent?
slava [35]
The queen size mattress has a catalog price of 428.99 dollars.
NOw, it has a trade discount rate or 20% 
=> 20% / 100% = .20
Next is to do the solution:
=>  428.99 * .20 = 85.798 dollars or 85.80
Now, let's find out the net price:
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5 0
3 years ago
I need help please ):
Otrada [13]

Answer;

X = 18: AD = 18

Step-by-step explanation:

Here, we want to find the measure of AD

From the given image;

AB = x + 3

AD = x

AC = 24 + 4 = 28

AE = 24

Substituting these values

we have ;

(x + 3)/x = 28/24

24(x + 3) = 28x

24x + 72 = 28x

28x - 24x = 72

4x = 72

x = 72/4

x =18

7 0
3 years ago
Question 3 (2 points)
Sveta_85 [38]
I believe the answer is a
5 0
3 years ago
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