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25 votes
(x-2)^3+(3x-1)(3x+1)=(x+1)^3

2 Answers

5 votes

Answer:

2x³+9x²=10

Explanation:

x³-8+9x²+3x-3x-1= x³+1

x³+9x²+3x-3x-x³=1+8+1

2x³+9x²=10

User Yurkee
by
7.2k points
4 votes

Answer:


x = (10)/(9)

Explanation:


(x-2)^3+(3x-1)(3x+1)=(x+1)^3


x^3-6x^2+12x-8+9x^2-1=x^3+3x^2+3x+1


x^3+3x^2+12x-9=x^3+3x^2+3x+1


x^3+3x^2+12x=x^3+3x^2+3x+10


12x=3x+10


9x = 10


x = (10)/(9)

User Cherif KAOUA
by
6.9k points