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3 years ago

Obtain all zeros of x^4-7x^2+12, if two numbers of its zeros are √3 and -√3

Mathematics

1 answer:

iogann1982 [59]3 years ago

4 0

Answer:

Step-by-step explanation:

x^2=u

u^2-7u+12=0

(u-3)(u-4)=0

u=3,4

x^2=3,4

x^2=3

x = ±√3

x^2 = 4

x=±2

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Solve please. Correctly<br> 3(1 - 2a) = -3a - 18

True [87]

Answer:

a = 7

Step-by-step explanation:

3(1 - 2a) = -3a - 18

3 - 6a = - 3a - 18

Add 18 to each side:

3 + 18 - 6a = - 3a - 18 + 18

21 - 6a = - 3a

Add 6a to each side:

21 - 6a + 6a = - 3a + 6a

21 = 3a

3a = 21

Divide each side by 3:

3a ÷ 3 = 21 ÷ 3

a = 7

6 0

3 years ago

How many different whole numbers will divide into 168 without a remainder

Fiesta28 [93]

Answer:

1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168

3 0

3 years ago

Which line has the equation 2x - 3y = 6?<br> (Please explain how you got your answer)

notsponge [240]

First, isolate y:
2x - 3y = 6
-3y = -2x + 6
3y = 2x - 6
y = 2/3x - 2
That means that the line passes through the point (0, -2) and has a positive slope of 2/3. So it would be choice A because the line in choice A passes through the point (1, -2) and has a positive slope. Choice D also passes through the point (0, -2) but has a negative slope so it cannot be the correct answer.
Choice A is correct.

3 0

4 years ago

Solve the following system of equations. Write each of your answers as a fraction reduced to lowest terms. In other words, write

morpeh [17]

Answer:

x = 57/28

y = -95/84

z = 97/168

Step-by-step explanation:

Use the application in the next link: https://www.zweigmedia.com/RealWorld/tutorialsf1/scriptpivotold.html

Start with the expanded array:

$\left[\begin{array}{cccc}1&5&8&1\\3&2&2&5\\-2&-7&2&5\\\end{array}\right]$