Factor completely: 25x2 - 64 a) 5(x - 8)(x + 8) b) 5(x - 8)(x - 8) c) (5x - 8)(5x + 8) d) (25x - 1)(x + 64)

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Find the value of the variable and the length of each secant segment.

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)