X^2+4X+20-0.8根号下10=0答案是多少？

X^2+4X+20-0.8根号下10=0答案是多少？

X^2+4X+20-0.8√10=0
（x+2)^2-4+20-0.8√10=0
（x+2)^2=0.8√10-16<0
在实数范围内有意义吗？

求根公式：△=b²-4ac<0
所以原方程无实数解

when traveling to new places. I think this is because museums tell them a lot about the culture of those places.    Museums are also fun. It’s almost impossible to get bored in a museum. Every museum will have at least one thing of interest to somebody.   When visiting someplace new, you can find out about the culture of that place in many ways. You can go to a movie or a place of worship or a nightclub. Another option is to sit in the park and listen to the people around you. The easiest way to learn about a place's culture, though, is by visiting its museums. Museums will show you the history of the place you're visiting. They’ll show you what art the locals think is important.If there aren't any museums, that tells you something, too.

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