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tomiriska14112002
@tomiriska14112002
June 2022
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Прошу помочь. Внизу в фото все написано.
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nKrynka
Решение
1) (15a² - 10ab) / (3ab - 2b²) = [5a(3a - 2b)] / [b(2a - 2b) = 5a/b
a = - 2, b = - 0,1
5*(-2) : (- 0,1) = 100
2) (9c² - 4b²) / (18c² - 12bc) = [(3c - 2b)*(3c + 2b)] / [6c(3c - 2b)] =
= (3c + 2b) / 6c
b = 0,5 c = 2/3
[3*(2/3) + 2*(0,5)] / [6*(2/3)] = (2 + 1) / 4 = 3/4 = 0,75
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Answers & Comments
1) (15a² - 10ab) / (3ab - 2b²) = [5a(3a - 2b)] / [b(2a - 2b) = 5a/b
a = - 2, b = - 0,1
5*(-2) : (- 0,1) = 100
2) (9c² - 4b²) / (18c² - 12bc) = [(3c - 2b)*(3c + 2b)] / [6c(3c - 2b)] =
= (3c + 2b) / 6c
b = 0,5 c = 2/3
[3*(2/3) + 2*(0,5)] / [6*(2/3)] = (2 + 1) / 4 = 3/4 = 0,75