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a) (4-3x)^2 = 16-3x^2
b) ( 1-3x)^2 = -3x+4x^2+9
c) (3x+2)^2 = 7(3x+2)
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a)
x=0 lub x= 12
b)
delta= 9+160 delta= 169 pierwiastek z delty= 13
x= -5 lub x= 8
c)
delta = 81+ 360
delta = 441
pierwiastek z delty = 21
x= -6 lub x= 15