If $$ left( x^2+{1 over x^2} right)- left( x - {1 over 4} right)- 7 =0 $$ then two value of x are :

• A. 1, 2
• B. $$ 2, -{1 over 2} $$
• C. 0, 1
• D. $$ {1 over 2} , 1 $$