Question

factorise by splitting the middle term:9(x-2y)^2-4(x-2y)-13

Answer 1

thats the factors of the equation

Answer 2

let x-2y=t
9t^2-4t-13
9t^ + 9t - 13t - 13
9t(t + 1) - 13(t + 1)
(9t - 13)(t + 1)
now put the value of t
(9x - 18y - 13)(x - 2y + 1)