X 2 49x 2 July 8, 2019 16 32 64 128 X 3 2x 2 49x 98 X 3 2x 2 49x 98 0 X 2 1 49x 2 Tìm x ( 5x-4)^2-49x^2=0 Factor x 3 2x 2 49x 98 2 49 x 2 X ^ 2 - 49 =
