b^2-4ac
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 roots
Use the discriminant to determine the nature of the roots.
1. 2x^2+5x-3=0
2. -x^2+x+1=0
1 answer