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Rfddr42
@Rfddr42
July 2022
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Решите уравнения подробно
1)3(х+5)-6х=4х-(х-3)
2)(х-3)(х+3)=(х+2)²-6х
3)(3а-4)²+5а=(3а-2)(3а+2)
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МариМайер
1)3х+15-6х=4х-х+3
-3х+15=3х+3
-6х=-12
х=2
2)х²-9=х²+4х+4-6х
-9=-2х+4
2х=4+9
2х=13
х=13/2 либо х=6 целых 1/2 то есть 6,5
3)9а²-24а+16+5а=9а²-4
-19а+16=-4
-19а=-20
а=20/19 либо а=1 целая 1/19
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Answers & Comments
-3х+15=3х+3
-6х=-12
х=2
2)х²-9=х²+4х+4-6х
-9=-2х+4
2х=4+9
2х=13
х=13/2 либо х=6 целых 1/2 то есть 6,5
3)9а²-24а+16+5а=9а²-4
-19а+16=-4
-19а=-20
а=20/19 либо а=1 целая 1/19