x2 - 10x + 25 = 0
(x - 5)(x - 5) = 0
x - 5 = 0
x = 5
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The discriminant is 25.
x2 + 10x = 0 x2 + 10x + 25 = 25 (x + 5)2 = 25 x + 5 = +-5 x1 = 0 x2 =10
A=0 b=0 c=0
2x^2 + 8x + 3 = 0
x2-5-4x2+3x = 0 -3x2+3x-5 = 0 or as 3x2-3x+5 = 0