Question 189935
Find all x that will make f(x)= 0 
f(x)= x^2 + 2x - 4 
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x^2+2x-4 = 0
Use the quadratic formula to get:
x = [-2 +- sqrt(2^2 - 4*1*-4)]/2
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x = [-2 +- sqrt(20)]/2

x = [-2 +- 2sqrt(5)]/2

x = [-1 +- sqrt(5)]
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Cheers,
Stan H.