Why does x^2-2x 7=0 have no real solutions?

I hope this helps you

disctirminant =(-2)^2-4.1. (-7)

disctirminant =4+28

disctirminant =32

x1=-(-2)+square root of32/2.1

x1=2+4 square root of 2/2=1+square root of 2

x2=1-square root of 2

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How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%