X 2 12x 13 0 July 8, 2019 16 32 64 128 X 2 12x 13 0 complete the square X2 12x 13 0 дискриминант X2 12x 13 0 rumus abc X2 12x 13 0 kuadrat sempurna X2 12x 13 0 faktorisasi 12−x 2 =−13