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x* -12x +36=0
Δ=144-4*1*36=144-144=0
x0=-b/2a=12/2=6
b)
2x*-3x=0
x(2x-3)=0
x=0,
2x-3=0->2x=3->x=3/2
x1=0
x2=3/2
c)
-x*+4=0
(x+2)(x-2)=0
x1=-2
x2=2
d)
5x*-6x + 6> 0
Δ=36-4*5*6=36-120=-84
Δ<0 wiec brak rozwiazania
delta=(-12)²-4×1×36=0-jedno rozwiązanie
×=12\2
×=6
×∈R\∫6∫
2ײ-3×=0
×(2×-3)=0
×=o
2×-3=0
2×=3
×=11\2
×∈R\∫0,11\2∫
-ײ+4=0
-ײ=-4\×(-1)
ײ=4
×=2 ∨ ×=-2
×∈R\∫-2,2∫
5ײ-6×=6>0
delta=(-6)²-4×5×6=36-120=-84
×∈R