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pav-90 [236]
4 years ago
5

What number must you add to complete the square x^2+8x=11

Mathematics
2 answers:
lara [203]4 years ago
4 0
3 is the answer because x^3+8x=11 you are wlecome
igomit [66]4 years ago
3 0
<span>x^2+8x=11

Take half of the coefficient (8) of x and square it.  Result:  16.

</span><span>x^2+8x=11      Add 16 to x^2+8x, and then subtract 64 from the result:

x^2 + 8x + 16 - 16 = 11
Recognize that the first 3 terms can be rewritten as (x+4)^2.

Then:

  (x+4)^2 - 16 = 11, or (x+4)^2 = 27

Answer:  Add 16, and then subtract 16, as shown.

Solve for x?  find the sqrt of both sides:  x+4 = plus or minus 3sqrt(3)

Then x = -4 plus or minus 3sqrt(3)</span>
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Step-by-step explanation:

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3 years ago
Bobs mom asked how he Had done on his math test . Bob said if you mupily my score by 3 then subtract 40 from they answer , then
amid [387]
Let bob score =x

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8 0
4 years ago
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RoseWind [281]
 0.363636363636

<span>..................=<span>411</span></span>

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Now as there are two digits repeating immediately after decimal point, we multiply above by 100 and get

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Now subtracting first equation from second we get

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6 0
3 years ago
17. y=1 - 2x x=9<br> (Help this is due today)
Masja [62]

Answer: y= -17

Step-by-step explanation:

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