СРОЧНО 10 БАЛЛОВ Разложите на множители квадратный тричлен 1) x^2

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СРОЧНО 10 БАЛЛОВ
Разложите на множители квадратный тричлен
1) x^2 - 8x -9
2) 3x^2 - 8x - 3

metal120770 1) х²-8х-9=0
D=64+36=100
x₁ = 8-10 / 2 = -1
х₂ = 8+10 / 2 = 9
х²-8х-9 = (х+1)(х-9)

2) 3х²-8х-3=0
D=64+36=100
х₁ = 8-10 / 6 = -1/3
х₂ = 8+10 / 6 = 3
3х²-8х-3 = 3(х+1/3)(х-3)

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ВикаВикторовна

Verified answer

x^2 - 8x -9
x^2+x-9x-9
x(X+1)-9(X+1)
(x-9)(x+1)

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