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x(x-8)=0
x=0 lub x-8=0
x=8
==============
7x²=2x
7x²-2x=0
x(7x-2)=0
x=0 lub 7x-2=0
7x=2 /:7
x=2/7
x^2-8x=0
x(x-8)=0
x=0 albo x=8
B)
7x^2=2x
7x^2-2x=0
x(7x-2)=0
x=0
albo
7x-2=0
7x=2
x=2/7