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LenaWriter [7]
3 years ago
13

Solve the equation x^4-64=0

Mathematics
2 answers:
ki77a [65]3 years ago
6 0

Answer:

A

Step-by-step explanation:

x^4=64

x^2= +- 8

x = +-sqrt2, x= +- i sqrt2

mina [271]3 years ago
4 0

Answer:

A

Step-by-step explanation:

x^4-64=0

factor

(x^2+8)(x^2-8)=0

zero property

x^2+8=0, x^2-8=0

x^2=0-8-8,

x^2=-8,

x^2=0+8=8,

x^2=8,

----------------

sqrt(8) & sqrt(-8),

gives you 2*sqrt(2) and -2*sqrt(2),

also, the square root of a negative number contains the imaginary number, i. Because sqrt(-1)=i, don't forget this formula.

So sqrt(-8)=2i*sqrt(2) and -2i*sqrt(2).

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The two numbers are <u>12 and 51.</u>

<h3>EXPLANATION</h3>

To solve this, I did 63-15, to get 48.

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3 years ago
What is the value of E(-1) n (3n+2)?
RoseWind [281]
<h3>Answer:  C) 6</h3>

====================================================

Explanation:

The weird looking E symbol is the greek uppercase letter sigma. It refers to a sum.

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------------------

If n = 1, then we have

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Let A = -5 as we'll use it later.

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If n = 2, then

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If n = 3, then

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Let C = -11

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If n = 4, then

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Let D = 14.

--------------------

We'll add up the values of A,B,C,D to get the final answer

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3 years ago
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Step-by-step explanation:

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If it’s costs 60 cents for 125 grammes. How much would 100 grammes cost?
beks73 [17]
<h3>✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Work out the cost per gram

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<h3><u>✽</u></h3>

➶ Hope This Helps You!

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