64x ^ 2 - 121 July 8, 2019 16 32 64 128 64x 2 121 64x 2 121 0 64x 2 121 factored 64x 2 121y 2 64x 2 176x 121 Factor completely 64x 2 121 X 2 22x 121 64 X 2 64 121 64 - x ^ 2 64 = 2^x