Ответ:1) (a+1)(a-1)(a²+1)= (a²-a+a-1)(a²+1) = (a⁴-a³ +a³-a²+a²-a+a-1) = (a⁴-1)
2) (a /2-5)(5+a /2) + 25= (5a+a²/-6) -25= 5a+a²-150/-6
D= 5²-4×1×(-150) =25+600=625
D= 25²
X1 = -5-25/2 = -30/2 = -15
X2 = -5+25/2 = 20/2= 10
Ответ: Х1 = -15; Х2 = 10
Объяснение:
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Ответ:1) (a+1)(a-1)(a²+1)= (a²-a+a-1)(a²+1) = (a⁴-a³ +a³-a²+a²-a+a-1) = (a⁴-1)
2) (a /2-5)(5+a /2) + 25= (5a+a²/-6) -25= 5a+a²-150/-6
D= 5²-4×1×(-150) =25+600=625
D= 25²
X1 = -5-25/2 = -30/2 = -15
X2 = -5+25/2 = 20/2= 10
Ответ: Х1 = -15; Х2 = 10
Объяснение: