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trava2400
@trava2400
August 2022
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помогите плиз , очень надо
решите уравнение
(2х-1)(2х+1)-4(х+5)в квадрате=19
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Katin
(2x-1)(2x+1)-4(x+5)²=19
4x²-1-4(x²+10x+25)-19=0
4x²-1-4x²-40x-100-19=0
-40x=120
x=-3
2 votes
Thanks 5
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Answers & Comments
4x²-1-4(x²+10x+25)-19=0
4x²-1-4x²-40x-100-19=0
-40x=120
x=-3