Решите уравнение (x+1) ²+(x-6)²=2x²
Аноним:
We have got a large three-room flat in a new block of flats. There are twelve floors in it. Our block has all modern conveniences, such as central heating, electricity, gas, running water (hot and cold ) and a telephone. Our flat is very comfortable. We have a dining-room, a bedroom and a study.
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Ответы
Ответ дал:
13
Ответ:
(х+1)²+(х-6)²=2х²
х²+2х+1+х²-12х+36-2х²=0
-10х+37=0
-10х=-37
х=(-37):(-10)
x=3,7
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