(2х-5)²-1=0
4x²-20x+25-1=0
4x²-20x+24=0 | :4
x²-5x+6=0
D=(-5)²-4*1*6=25+24=1
x= 5±1/ 2
x1 = 3
x2 = 2
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(2х-5)²-1=0
4x²-20x+25-1=0
4x²-20x+24=0 | :4
x²-5x+6=0
D=(-5)²-4*1*6=25+24=1
x= 5±1/ 2
x1 = 3
x2 = 2