if x=2+2^(2/3)+2^(1/3)yhen x^3-6x^2+6x= ?Please show the steps.
raunak samanta , 13 Years ago
Grade 11
Magical Mathematics[Interesting Approach]> Simple Quadratic...
1 Answers
sanatan sharma
Last Activity: 13 Years ago
x = 2 + 22/3 + 21/3
x - 2 = 22/3 + 21/3
cubing both the sides
(x - 2)3 = ( 22/3 + 21/3 )3
x3 - 8 - 6x( x-2) = 4 + 2 + 6( x-2 )
x3 - 8 -6x2 + 12x = 6 + 6x -12
x3 -6x2 + 6x = 2
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