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zysi [14]
3 years ago
13

Find the exact roots of x^2+10x-8=0 by completing the square

Mathematics
1 answer:
irinina [24]3 years ago
5 0
From the original equation x^2+10x-8=0, move the loose number on the other side. Your new equation will be x^2+10x=8. Moving an element from one side to another reverses its sign. From -8 to +8. Then take half of the x-term and square it and add it on both sides. X-term is 10x and 10 is the number, half of it is 5 then square of 5 is 25. Add 25 on both side. Your new equation will be x^2+10x+25=8+25. Then complete the square form of the left side of the equation, (x+5)^2=33. Square root both side then you will get x+5=squareroot of 33. Your x = -5 plus/minus squareroot of 33.
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Answer:

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Change this fraction into a decimal: 20/25
marissa [1.9K]
.8

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3 years ago
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UESTION 4
lubasha [3.4K]

Answer:

x = 15.8

Step-by-step explanation:

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according to the question equation is

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3 years ago
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PLEASE HELP ASAP, giving brainlist t anyone who answers <3
Lina20 [59]
The answer would be 2 :))
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