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b2 - 4ac

Example:

X2 + 4X - 8 = 0

a = 1

b = 4

c = - 8

42 - 4(1)(- 8)

16 + 32

= 48

==========this positive answer indicates two real roots

A negative answer indicates no real roots and a zero answer indicates only one real root.

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12y ago

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