PreCalc/Trig...
Use the discriminant to determine the nature of the roots.
1. 2x^2+5x3=0
2. x^2+x+1=0
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Anonymous

b^24ac
5^2 4(2)(3)
that will be positive and therefore its square root is a real number. Thus two real roots, nothing imaginary about it
1^2  4(1)(1)
everything positive again, two real rootsposted by Damon
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