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moor75
@moor75
July 2022
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решитеееееее пж!)!!))!!))!)!)!)!)!))!)!
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linkOln78
1)х(х-4)=2+(х-1)²
х²-4х=2+х²-2х+1
-4х=2-2х+1
-4х=3-2х
-4х+2х=3
-2х=3
х=1.5
2)(х+2)(х-3)-3=(х+1)²
х²-3х+2х-6-3=х²+2х+1
-3х-6-3=1
-3х-9=1
-3х=1+9
-3х=10
х=10/3 (десять дробь три)
3)у(5-у)=1-(у+2)²
5у-у²=1-(у²+4у+4)
5у-у²=1-у²-4у-4
5у=1-4у-4
5у=-3-4у
5у+4у=-3
9у=-3
у=-⅓
4)(у-1)²-(у+1)(у-7)=0
у²-2у+1-(у²-7у+у-7)=0
у²-2у+1-(у²-6у-7)=0
у²-2у+1-у²+6у+7=0
4у+8=0
4у=-8
у=-2
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Answers & Comments
х²-4х=2+х²-2х+1
-4х=2-2х+1
-4х=3-2х
-4х+2х=3
-2х=3
х=1.5
2)(х+2)(х-3)-3=(х+1)²
х²-3х+2х-6-3=х²+2х+1
-3х-6-3=1
-3х-9=1
-3х=1+9
-3х=10
х=10/3 (десять дробь три)
3)у(5-у)=1-(у+2)²
5у-у²=1-(у²+4у+4)
5у-у²=1-у²-4у-4
5у=1-4у-4
5у=-3-4у
5у+4у=-3
9у=-3
у=-⅓
4)(у-1)²-(у+1)(у-7)=0
у²-2у+1-(у²-7у+у-7)=0
у²-2у+1-(у²-6у-7)=0
у²-2у+1-у²+6у+7=0
4у+8=0
4у=-8
у=-2