SOLUTION: is there a solution for y=x^+2 x+7

Question 1131705: is there a solution for y=x^+2 x+7
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
y = x^2 +2x +7
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a solution is
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x^2 +2x +7 = 0
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complete the square
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x^2 +2x +1 = -7 +1
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(x+1)^2 = -6
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x+1 = square root(-6)
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x = -1 +i*square root(6)
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x = -1 -i*square root(6)
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y = x^2 +2x +7 does not cross the x axis so it has no zeros, the solutions for x are complex
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note that i = square root(-1)
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