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svlad2 [7]
3 years ago
5

Solve x2 + 10x + 7 = 0 by completing the square. Which equation is used in the process?

Mathematics
2 answers:
Svetach [21]3 years ago
8 0

Answer:

(x+5)^2=18

Step-by-step explanation:

Twas on my final

BaLLatris [955]3 years ago
5 0
x^2+10x+7=0\ \ \ \ |subtract\ 7\ from\ both\ sides\\\\x^2+2x\cdot5=-7\ \ \ |add\ 5^2\ to\ both\ sides\\\\x^2+2x\cdot5+5^2=-7+5^2\ \ \ |use\ a^2+2ab+b^2=(a+b)^2\\\\(x+5)^2=-7+25\\\\(x+5)^2=18\iff x+5=\pm\sqrt{18}\\\\x+5=-\sqrt{18}\ or\ x-5=\sqrt{18}\\\\x+5=-\sqrt{9\cdot2}\ or\ x-5=\sqrt{9\cdot2}\\\\x+5=-\sqrt9\cdot\sqrt2\ or\ x-5=\sqrt9\cdot\sqrt2\\\\x+5=-3\sqrt2\ or\ x-5=3\sqrt2\ \ \ |subtract\ 5\ from\ both\ sides\\\\\boxed{x=-5-3\sqrt2\ or\ x=-5+3\sqrt2}
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Answer:

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Step-by-step explanation:

6 0
4 years ago
The volumes of two similar solids are 729 inches3 and 125 inches3. If the surface area of the smaller solid is 74.32 inches2, wh
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3 0
4 years ago
Read 2 more answers
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Lyrx [107]
I’m not sure whether there is a typo in the function but I might have the answer.

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3 years ago
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