If x 2 x 2 2x 3 4x 1 then x is July 8, 2019 16 32 64 128 If x ≠ − 1 2 then 6 x 3 + 3 x 2 − 8 x − 4 2 x + 1 = If x^2+3 4 and 2x^2+3 4