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trasher [3.6K]
3 years ago
8

I NEED HELP ASAP!!! please show work

Mathematics
1 answer:
katen-ka-za [31]3 years ago
3 0
What’s ur problem???????
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Solve x^4 - 3x^2 +2 = 0 using substitution.
Leona [35]

Answer:

x = ± 1 , x = ± \sqrt{2}

Step-by-step explanation:

Let u = x² , then

x^{4} - 3x² + 2 = 0 , can be expressed as

u² - 3u + 2 = 0 ← in standard form

(u - 1)(u - 2) = 0 ← in factored form

Equate each factor to zero and solve for u

u - 1 = 0 ⇒ u = 1

u - 2 = 0 ⇒ u = 2

Change the variable u back to x

x² = 1 ( take square root of both sides )

x = ± 1

or

x² = 2 ( take square root of both sides )

x = ± \sqrt{2}

4 0
2 years ago
A manufacturing company plans to progressively increase its production capacity over the next few quarters. (A quarter is a peri
mihalych1998 [28]

Answer:

  5 months

Step-by-step explanation:

We assume that y represents production capacity, rather than <em>increase</em> in production capacity. Then we want to solve the 6th-degree equation ...

  x^6 -25x^4 +199x^2 -4975 = 0

This can be factored in groups as ...

  x^4(x^2 -25) + 199(x^2 -25) = 0

  (x^4 +199)(x^2 -25) = 0

This has 4 complex solutions and 2 real solutions.

  x^2 = 25

  x = ±5

The duration required for capacity to reach 4975 units is 5 months.

7 0
3 years ago
Express -36/78 as a rational number with numerator 6:
Kruka [31]

Answer:

6/9

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help. I just am I bit confused..
8_murik_8 [283]

Answer:

add tjem all up and fid the outnumber one

Step-by-step explanation:

8 0
3 years ago
Let = 〈−2,−1〉 and = 〈−4, 3〉, find −.<br> a) 〈−6, 2〉 b) 〈−3,−1〉 c) 〈2,−4〉 d) 〈−2, 4〉
Norma-Jean [14]
Hi bestie ily I hope you find the answers ‍♀️
5 0
3 years ago
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