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valeria575
@valeria575
August 2022
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Срочно!!!:-7x^2-3x=0
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DenQ04a
-7x^2-3x=0 | : (-1)
7x^2 + 3x = 0
x(7x+3) = 0
x = 0
или
7x + 3 = 0
7x = -3
x = -3/7
Ответ : 0; -3/7
0 votes
Thanks 1
valeria575
спасибо большое ,а можешь помочь еще один пример ?
DenQ04a
Какой
valeria575
(x-1)^2=2x^2-6x-31
DenQ04a
(x-1)^2=2x^2-6x-31
x^2 - 2x + 1 = 2x^2 - 6x - 31
x^2 - 2x^2 - 2x + 6x + 1 + 31 = 0
-x^2 + 4x + 32 = 0 | : (-1)
x^2 - 4x - 32 = 0
x1 = 8
x2 = -4
Ответ : 8; -4
valeria575
спасибо огромное
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Answers & Comments
7x^2 + 3x = 0
x(7x+3) = 0
x = 0
или
7x + 3 = 0
7x = -3
x = -3/7
Ответ : 0; -3/7
x^2 - 2x + 1 = 2x^2 - 6x - 31
x^2 - 2x^2 - 2x + 6x + 1 + 31 = 0
-x^2 + 4x + 32 = 0 | : (-1)
x^2 - 4x - 32 = 0
x1 = 8
x2 = -4
Ответ : 8; -4