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A) 2x(m-ym/2x-1+y/2x
Zad.2
(a+b)²=a²+2ab+b²
(a-b)²=a²-2ab+b²
a²+2ab+b²+x=a²-2ab+b²
x=-4ab
Zad.3
a)
P=1/2*d₁*d₂
d₁=x
d₂=120x/100
P=1/2*x*120x/100=6/10x²=3/5x²