Solve the equation:
(2x - 1)2 – x(10x + 1) = x(1 – x)(1 + x) – (2 – x)3  Choose the correct answer:
A) 1 B) 1/2 C) 2 D) 2/1 E) None
Solution:   (2x - 1)2 – x(10x + 1) = x(1 – x)(1 + x) – (2 – x)3 &lt;=&gt;   4x2 - 4x + 1 -10x2 – x = x – x3 - 8 + 12x - 6x2 + x3 &lt;=&gt;   18x = 9 &lt;=&gt; x = 1/2   Answer 1/2
<result>B</result>
Solve the equation:
(2x - 1)2 – x(10x + 1) = x(1 – x)(1 + x) – (2 – x)3