cindy974
cindy974
19-04-2022
Mathematics
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palium
palium
19-04-2022
Answer = 1
If a + b - 3 = 0
then, a = 3 - b.
Let’s substitute it in the second expression.
(3 - b)^3 + b^3 + 9(3 - b)(b) - 26 = 27 - 27b + 9b^2 - b^3 + b^3 + 9(3b - b^2) -26 =
= 27 - 27b + 9b^2 + 27b - 9b^2 - 26 = 1
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