Ответ:
Объяснение:
...........
1). (4a² - 1)/3 = a(10a - 9)
4a² - 1 = 30a² - 27a
26a² - 27a + 1 = 0 D = b²-4ac = 729 - 104 = 625 = 25²
a₁ = (27+25)/52 = 1
a₂ = (27-25)/52 = 1/26
Ответ: {1; 1/26}
2). (a² + a)/2 = (8a - 7)/3 | *6
3a² + 3a = 16a - 14
3a² - 13a + 14 = 0 D = b²-4ac = 169 - 168 = 1
a₁ = (13+1)/6 = 2 1/3
a₂ = (13-1)/6 = 2
Ответ: {2; 2 1/3}
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Verified answer
Ответ:
Объяснение:
...........
Verified answer
1). (4a² - 1)/3 = a(10a - 9)
4a² - 1 = 30a² - 27a
26a² - 27a + 1 = 0 D = b²-4ac = 729 - 104 = 625 = 25²
a₁ = (27+25)/52 = 1
a₂ = (27-25)/52 = 1/26
Ответ: {1; 1/26}
2). (a² + a)/2 = (8a - 7)/3 | *6
3a² + 3a = 16a - 14
3a² - 13a + 14 = 0 D = b²-4ac = 169 - 168 = 1
a₁ = (13+1)/6 = 2 1/3
a₂ = (13-1)/6 = 2
Ответ: {2; 2 1/3}