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nika2016kim
@nika2016kim
August 2021
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решите уравнение....срочно срочно срочно
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Штука
(x-3)(x-6) + 7(x-6)(x+6)=5(x+6)(x-3)
x^2 - 3x - 6x +18 + 7x^2 -252 = 5 (x^2+6x-3x-18)
x^2 -9x+18 + 7x^2 - 252= 5x^2+30x-15x-90
8x^2 - 9x - 234=5x^2 +15x - 90
3x^2- 24x -144=0
x^2 - 8x -48=0
D= 64 - 4 * 1 * (-48)= 256
x1 = 8+16/2 = 12
x2=8-16/2=-4
Ответ: -4, 12.
Поставь как лучший))
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Answers & Comments
x^2 - 3x - 6x +18 + 7x^2 -252 = 5 (x^2+6x-3x-18)
x^2 -9x+18 + 7x^2 - 252= 5x^2+30x-15x-90
8x^2 - 9x - 234=5x^2 +15x - 90
3x^2- 24x -144=0
x^2 - 8x -48=0
D= 64 - 4 * 1 * (-48)= 256
x1 = 8+16/2 = 12
x2=8-16/2=-4
Ответ: -4, 12.
Поставь как лучший))