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Margarita [4]
3 years ago
11

What number must be added to complete the square? X^2-20x=17

Mathematics
1 answer:
Ilya [14]3 years ago
4 0
-117 must be added to complete the square.
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What is the answer of this question? ​
TEA [102]

9514 1404 393

Answer:

  970

Step-by-step explanation:

It turns out that the radical terms cancel, so the result is an integer. You can find the integer value using your calculator. It is ...

  (5 +2√6)³ +1/(5 +2√6)³ = 970

_____

The cube of 'a' is ...

  (5+2√6)³ = 5³ +3·5²·2√6 +3·5·(2√6)² +(2√6)³

  = 125 +3·50√6 +3·120 +48√6

  a³ = 485 +198√6

The reciprocal of this is ...

  b³ = 1/a³ = 1/(485 +198√6) = (485 -198√6)/(485² -6·198²) = (485 -198√6)/1

  b³ = 485 -198√6

Then the sum is ...

  a³ +b³ = (485 +198√6) +(485 -198√6) = 970

6 0
3 years ago
A board is 4 feet 8 inches long how long is the board inches
Otrada [13]

the board is 56 inches long.

how i did this was

12 * 4 = 48

48 + 8 = 56

<em>hope this helps :)</em>

7 0
3 years ago
A cooler contains 5 bottles of lemonade, 4 bottles of water, and 3 bottles of juice. Each type is equally likely to be chosen. B
-BARSIC- [3]
You need to find a number that all three of those numbers go into. They all go into 60. Then, divide 60 by three because there are three items. 60 divided by 3 is 20, which is the answer.
6 0
3 years ago
(ONLY TWO CAPITAL LETTERS) PLEASE ANSWER CORRECTLY!!!!!! WILL MARK BRIANLIEST!!!!!!!! URGENT
lesantik [10]

Answer:

HN congruent to NL

Step-by-step explanation:

They have a line crossing both of them, signifiying congruence.

6 0
3 years ago
15y +5x- 7y+1x-3y i need help
vladimir2022 [97]

Answer:

simplify the expression: 6x+5y

Step-by-step explanation:

8 0
3 years ago
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