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zaharov [31]
4 years ago
14

X^2-2x−4=0 please leave ans in surd form and simplify​

Mathematics
2 answers:
Vlada [557]4 years ago
6 0

<em>Hi there!</em>

<em>How are you?</em>

<em>Answer:</em>

<em />\boxed{x = + \sqrt{5} |Or| x = 1 - \sqrt{5}  }<em />

<em>Step-by-step explanation:</em>

<em>First you have to use quadratic formula with </em>a=1, b=-2, c=-4.<em />

<em />x = \frac{-b \± \sqrt{b^2 -4ac} }{2a}<em />

<em />x = \frac{-(-2) \± \sqrt{(-2)^2 - 4(1)(-4)} }{2(1)}<em />

<em />x = \frac{\sqrt{^2\± \sqrt{20} } }{2}<em />

<em />x = + \sqrt{5}<em> or </em>x = 1 - \sqrt{5}<em />

<em>Hvae a good day/night!</em>

Jobisdone [24]4 years ago
3 0

Step-by-step explanation:

using the quadratic formula......

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Consider the line y equals 2 over 5 x plus 4.
crimeas [40]

the parallel linear equation is:

y = (2/5)*x - 3

<h3></h3><h3>How to find the parallel line?</h3>

Two lines are parallel if the lines have the same slope but different y-intercept.

Here we know the line equation:

y = (2/5)*x + 4

Then a parallel line is of the form:

y = (2/5)*x + c

Where c is different than 4.

We want this line to pass through (5, -1), then:

-1 = (2/5)*5 + c

-1 = 2 + c

-1 - 2 = -3 = c

Then the parallel linear equation is:

y = (2/5)*x - 3

If you want to learn about linear equations:

brainly.com/question/1884491

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3 0
2 years ago
What is the algebraic expression in 11x-6x-x
adelina 88 [10]

Answer:

4x

Step-by-step explanation:

Simplify. Combine like terms. Note that x = 1x, being that there is one variable of x.

11x - 6x = 5x

5x - x = 4x

4x is your answer.

~

5 0
3 years ago
Read 2 more answers
Solve the system of equations. x + 3y = −12x + 2y = 6
UkoKoshka [18]

Answer:

x=-3/19

y=39/19

Step-by-step explanation:

the equations can be written as the following system

x+3y=6\\-12x+2y=6

If the second equation is multiplied by 3/2 it will become -18x+3y=9

If that equation is then subtracted with the first you will obtain the following

-19x=3, it means x=-3/19

The other variable is obtained by substituting the new value for x in the first equationx+3y=6, thus we obtain that y=39/19

7 0
3 years ago
Find the volume of a cone with a diameter of 16 m and a height of 8 m. 2143.57 m3 535.89 m3
Mrac [35]
535.89 m3 is the correct.
6 0
4 years ago
What is the unit rate??
telo118 [61]
The unit rate is 5.5
Equation: 11 divided by 2=5.5
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