Предмет: Алгебра, автор: igorpopov0920

решите уравнение x²+8x+15=0​

Ответы

Автор ответа: didi01san
1

x²+8x+15=0​

x^{2} +5x+3x+15=0\\x*(x+5)+3(x+5)=0\\(x+5)*(x+3)=0\\x+5=0\\x+3=0\\x=-5\\x=-3\\x_{1} =-5, x_{2} =-3

Можно лучшим?)

Автор ответа: MikeRex
2

Ответ:

x²+8x+15=0​

Ответ ,относительно "x"

x1=-5;x2=-3

Объяснение:

  • x²+8x+15=0

x(x+5)+3(x+5)=0

(x+5)(x+3)=0

1)x+5=0

2)x+3=0

1)=-5

2)=-3

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