Ответ №1
D=58^2 + 4 × 21 × 40 = 3364 + 3360 = 6724 = 82^2.
Х1=( -58+82) / 2 × 21 = 24/42= 3/7.
Х2=(-58-82) / 2×21 = -140/ 42 = -10/3
Ответ №1
D=58^2 + 4 × 21 × 40 = 3364 + 3360 = 6724 = 82^2.
Х1=( -58+82) / 2 × 21 = 24/42= 3/7.
Х2=(-58-82) / 2×21 = -140/ 42 = -10/3
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