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-4x+4=0
-4x=-4
x=1
kw=kwadrat
spr. (1-2)2 = 1kw.
1=1
b) 4x2 - 8x + 4 = 4x2 - 16x
-8x+16x = -4
8x=-4
x=-1/2
spr. (2 * -1/2 - 2)2 = 4 * (-1/2)( -1/2 -4)
9= 9
c) 4x2 - 3x = 4x2 -12x +9
-3x +12x = 9
x= 1
spr. 4-3= (2-3)2
1= 1