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const2013 [10]
4 years ago
5

What number should be added to both sides of the equation to complete the square? X^2-10=7

Mathematics
1 answer:
Assoli18 [71]4 years ago
8 0
I must assume that you meant   <span>X^2-10x =7.  If that is indeed the case, then:

</span>X^2-10x =7  =>  x^2 -10x + 25 - 25 = 7, so that (x-5)^2 = 32  (Add 25, then 
                                                                                                 subtract 25)
Then x-5 = plus or minus sqrt(16)sqrt(2) = 4sqrt(2).

Then x = 5 plus or minus 4 sqrt(2) (answers)
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Please help me thank u
finlep [7]
It would be A=18 because of the equation a^2+b^2=c^2.
3 0
3 years ago
3m - 3 divided by 3 for m=8
KengaRu [80]

Answer:

Either 7 or 23 - read note

Step-by-step explanation:

Substitute m for 8.

*Note: I'm not sure if anything is in parentheses so there are two possible answers depending on whether you want it done left to right or by order of operations*

Left to Right:

3(8) - 3 ÷ 3

24 - 3 ÷ 3

21 ÷ 3

7

Order of Operations:

3(8) - 3 ÷ 3

24 - 3 ÷ 3

24 - 1

23

6 0
3 years ago
Read 2 more answers
5.45 times what is 65 real urgent
Sonbull [250]
Opposite operation of multiplication = division. 
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4 years ago
How do you solve this equation√8k=k
kondor19780726 [428]

the answer is                        

<span>[√8k ]² =k², so  8k=k² which implies k² - 8k= 0, and (k – 8)k= 0, so k = 8 or k =0</span>

8 0
3 years ago
6 tenths + 3 thousands= how many thousandths
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