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Doss [256]
4 years ago
13

2x²-12x+8 = 0 solve for x ​

Mathematics
1 answer:
Luda [366]4 years ago
6 0

Answer:

x = 3 + sqrt(5) or x = 3 - sqrt(5)

Step-by-step explanation:

Solve for x over the real numbers:

2 x^2 - 12 x + 8 = 0

Divide both sides by 2:

x^2 - 6 x + 4 = 0

Subtract 4 from both sides:

x^2 - 6 x = -4

Add 9 to both sides:

x^2 - 6 x + 9 = 5

Write the left hand side as a square:

(x - 3)^2 = 5

Take the square root of both sides:

x - 3 = sqrt(5) or x - 3 = -sqrt(5)

Add 3 to both sides:

x = 3 + sqrt(5) or x - 3 = -sqrt(5)

Add 3 to both sides:

Answer: x = 3 + sqrt(5) or x = 3 - sqrt(5)

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-1/5(-2 1/4)? (-1/5 x -2 1/4)=?? Brainilist
strojnjashka [21]

-  \frac{1}{5}  \times  - 2 \frac{1}{4}  \\  -  \frac{1}{5}  \times ( - 2) \times  \frac{1}{4}  \\  \frac{1}{5}  \times 2 \times  \frac{1}{4}  \\  \frac{1}{5}  \times  \frac{1}{2}  \\ \\ answer =  \frac{1}{10}  \\

<h2>Final Answer: 1/10</h2>

Alternate Forms:

  • Decimal: 0.1

Hope it helps

8 0
3 years ago
Read 2 more answers
Use the order of operations to solve the problem. 3 x 2 + 7​
IceJOKER [234]

Answer:

13

Step-by-step explanation:

3 x 2 + 7

6 + 7  (Do multiplication first)

13 (Then add from left to right)

4 0
3 years ago
Can Someone Help Me With These Three Please?
lakkis [162]

Answer:

  • ΔHJK shows G as the orthocenter
  • Show A.F is the median of BC
  • 18

Step-by-step explanation:

1) This is a vocabulary question. The <em>orthocenter</em> is the point where the altitudes intersect. Of course, each altitude is a segment from a vertex that is perpendicular to the opposite side of the triangle.

Perhaps it could be useful to remember the prefix ortho- means perpendicular, as in <em>orthogonal</em>. Each altitude is perpendicular to one of the sides of the triangle.

__

2) To do this proof, you would find midpoints of segments AB and AC, write the equations of the lines through them from the opposite vertex, then solve those equations to find point G. You would then write the equation for line AG and find its intersection point with segment BC (point F). The last step is to show that point F is the midpoint of BC. (It might be easier to show that midpoint F is on line AG.)

The closest answer choice, though poorly worded, is the last one: show A.F is the median of BC.

(Strictly speaking, a line segment (A.F) is not a median of a line segment (BC), but can be a median of a <em>triangle</em>, or a <em>bisector</em> of a line segment.)

__

3) The centroid divides the median into parts with the ratio 2:1. That is, the shorter part differs from the longer one by 2-1 = 1 ratio unit. If those parts differ in length by 6 measurement units, then one ratio unit must be 6 measurement units. The total length of the median is 2+1 = 3 ratio units, or 3×6 measurement units = 18 measurement units.

_____

<em>Comment on A.F</em>

Brainly thinks the name of the segment starting with A and ending with F is a "bad word" so won't let it be posted.

6 0
4 years ago
6.
Dmitry [639]

Answer:

A.    c = 16d + 18

Step-by-step explanation:

Solution:

we are given with a data table and we have been asked to find the function rule.

If we closely observe the table then we find that table is following the below function rule

Check for

Check for

Check for

Check for

Hence the correct option is c = 16d + 18

...............................................................................................................................................

maddymcg408

Virtuoso

250 answers

3.8K people helped

Answer:

c = 16d + 18

Step-by-step explanation:

3 0
3 years ago
Solve.<br> 5y - 10 = -25<br><br> Pls explain
Ira Lisetskai [31]
5y-10=-25
5y=-25+10 addition property of equa
5y=-15 simplifying
Y=-15/5 dividing property
Y=-3
4 0
3 years ago
Read 2 more answers
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