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Minchanka [31]
2 years ago
15

Need this answer in the next two minutes please!!!!

Mathematics
1 answer:
Aleks04 [339]2 years ago
8 0

Answer:

D

Step-by-step explanation:

my friend answer this same question the other day

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(20 points!) Delisa is designing a website that will be viewable on both computers and mobile devices, so the website as it is s
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A car travels 100 meters in 5 seconds. what is the speed of the car
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Liz flips a coin 60 times. The coin lands heads up 36 times and tails up 24 times. The EXPERIMENTAL probability of the coin land
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What are the solutions of the equation x4+3x2+2=0? use u substitution to solve
sweet [91]

Answer: x = ± i , x = ±√2i are solution .

Step-by-step explanation:

Given : x^{4} +3x^{2} +2=0, use u substitution to solve.

To find : what are the solutions of the equation .

Solution : We have given that x^{4} +3x^{2} +2=0.

Let consider x^{2} = u .

Substitute u =  x^{2} in given equation .

u^{2} + 3u +2=0.

On factoring

u^{2} + 2u+1u +2=0.

Taking common

u( u+2) +1 (u+2) = 0.

On grouping

(u+1) (u+2) =0

Now, u+1 = 0 ⇒ u = -1.

         u+2 = 0 ⇒ u = -2.

In term of x, plugging x^{2} = u.

x^{2} = -1   ;  x^{2} = -2.

taking square root both side

x = ± i

x = ±√2i.

Therefore, x = ± i , x = ±√2i are solution .

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3 years ago
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