Предмет: Алгебра, автор: Оля120

решите уравнение (3+x)^2+(5-2x)(5+2x)-3(5-x^2)=1

Ответы

Автор ответа: CVita

3

$(3+x)^2+(5-2x)(5+2x)-3(5-x^2)=1 \\ 9+6x+x^2+25-4x^2-15+3x^2=1 \\ 6x+19=1 \\ 6x=18 \\ x=3$

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