Вопрос школьника по предмету Алгебра
Решите! Подробно! Уравнение, тема «многочлены»
x²+(5x-2)-(3x+1)=3x+x²
Ответ учителя по предмету Алгебра
х²+(5х-2)-(3х+1)=3х+х²
Сократим х². Раскроем скобки, если перед скобкой стоит минус, то знак в скобке меняется:
5х-2-3х-1=3х
Переместим х в левую сторону, а числа в правую:
2х-3=3х
Вычтем подобные члены:
-х=3
Изменим знак обеих частей уравнения:
х=-3.
Ответ: -3.
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