(5х-1)(х+1)=12(х-2)
5х² - х + 5х - 1 = 12х - 24
5х² - 8х + 23 = 0
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(5х-1)(х+1)=12(х-2)
5х² - х + 5х - 1 = 12х - 24
5х² - 8х + 23 = 0