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3 years ago

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

Mathematics

2 answers:

pogonyaev3 years ago

3 0

Answer:

see explanation

Step-by-step explanation:

Let u = x² ( choice of variable is flexible ), then

4u² - 21u + 20 = 0 ← expressed as a quadratic

This can now be solved for u and converted back into terms of x

Ipatiy [6.2K]3 years ago

3 0

Answer:

refer the explanation

Step-by-step explanation:

this question can be written as

X^2=y

so,x^4=y^2

so it will be 4y^2-21y+20=0

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If Adam buys 5 snakes at 20% off and each snake costs s dollars, which expression is NOT equivalent to the situation stated?

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3 years ago

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Hoochie [10]

Answer:

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2 years ago

Which of the following is the simplified expression of 2 square root of -16 + the square root of 225 in standard form, a plus b

LuckyWell [14K]

Answer:

<em>The standard form like $(a+bi)$ will be: $15+8i$ </em>

Step-by-step explanation:

Given expression is: $2\sqrt{-16}+\sqrt{225}$

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Now, replacing $\sqrt{-1}$ as $i$ .......

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3 years ago

Read 2 more answers

Write an inequality to represent “three less than twice a number is at least negative one”

Drupady [299]

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3 years ago

-1<9+n<17 how would I solve this compound equality?

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Answer:

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Step-by-step explanation:

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