решитьуравнение 9х(х-2)-(3х+5)^ 2 =1. Created by mananakavlelash. algebra-ru

решитьуравнение 9х(х-2)-(3х+5)^ 2 =1...

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9x^2 - 18x - (9x^2 + 30x + 25) - 1 = 0
9x^2 - 18x - 9x^2 - 30x - 26 = 0
- 18x - 30x - 26 = 0
- 48x - 26 = 0
- 48x = 26
48x = - 26
x = - 26/48
x = - 13/24

2 votes Thanks 0

KittenMurMur 9х(х-2) - (3х + 5)^2 = 1
9х^2 - 18х - (9х^2 + 30х + 25) = 1
9х^2 - 18х - 9х^2 - 30х - 25 = 1
- 18х - 30х = 1 + 25
- 48х = 26
х = - 0, 542 (приблизительно)

1 votes Thanks 0

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