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Лиза2304
@Лиза2304
July 2022
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Решите пример (9класс)
(2x-3)²=(3x+1)²
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belorussia3
4x^2-12x+9=9x^2+6x+1
4x^2-12x+9-9x^2-6x-1=0
-5x^2-18x+8=0 (умножаем на -1)
5x^2+18x-8=0
D=b^2-4ac=18^2+4*5*8=корень 484=22
х1,2=(-b-+D)/2a
x1=(-18-22)/2*5=-4
x2=(-18+22)/2*5=0.4
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Answers & Comments
4x^2-12x+9-9x^2-6x-1=0
-5x^2-18x+8=0 (умножаем на -1)
5x^2+18x-8=0
D=b^2-4ac=18^2+4*5*8=корень 484=22
х1,2=(-b-+D)/2a
x1=(-18-22)/2*5=-4
x2=(-18+22)/2*5=0.4