To find the value of the expression, we will first multiply the two given points:

(5,8x-40,1)• (-2,4) = (5(-2), 8(-2) - 40,1*4)
= (-10, -16 - 40, 4)
= (-10, -56, 4)

Next, we will multiply the second given points:

(3,2x-23,9)•0,8 = (30,8, 2x0,8 - 23,9*0,8)
= (2,4, 1,6x - 19,12)
= (2,4, 1,6x - 19,12)

Therefore, the expressions are not equal as (-10, -56, 4) is not equal to (2,4, 1,6x - 19,12).