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July 2022
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Решить уравнение: –2x^2 + 4x – 7 = –x^2 + 2x – (x^2 – 3)
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crdd
-2х²+4х-7=-х²+2х-(х²-3)
-2х²+4х-7=-х²+2х-х²+3
-2х²+4х-7=-2х²+2х+3
-2х²+4х+2х²-2х=3+7
2х=10
х=5
ответ: 5
2 votes
Thanks 1
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Answers & Comments
-2х²+4х-7=-х²+2х-х²+3
-2х²+4х-7=-2х²+2х+3
-2х²+4х+2х²-2х=3+7
2х=10
х=5
ответ: 5