Question 140900
1) It has a minimum because the coefficient of x^2 is positive.
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2) 
x^2+4x-5=0
(x+5)(x-1)=0
x=-5, x=1
(-5,1)
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3)
(-5+1)/2=-2
Line of symmetry  is a vertical line on y=-2
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Ed
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{{{graph(500,500,-10,10,-10,10,x^2+4x-5)}}}