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Y_Kistochka [10]
3 years ago
8

What substitution should be used to rewrite 4x^4-21x^2+20=0 as a quadratic equation ​

Mathematics
1 answer:
Marat540 [252]3 years ago
7 0

Answer:

u = x^2

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

we know that

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we have

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xenn [34]

Answer: The answer is 22,452

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3 years ago
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Elena L [17]

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a cell phone plan offers 250 minutes each month for 15.00 dollars per month. what is the cost per minute when a person uses all
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