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compute the discriminate. x^2 -4x+4 =0

determine the number and type of solution.
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2 Answers

x2 - 4x + 4 = 0
 
a = 1, b = -4, c = 4
 
b- 4ac
 
(-4)2 - 4*1*4
 
16 - 16 = 0
 
one real solution.
 
X2 - 4x + 4 = 0
 
(x-2)2 = 0
 
Hence, x =2 and multiplicity is 2.