Question

if y ≥ 4 is an even natural number and x = y² - 2y ,then the largest number that always divides x² - 8x is?

Answer 1

Answer:

y=2,4

y²-2y=2²-2(2)=0

=4²-2(4)=16-8=8

x=8

x²-8x=8²-8(8)=0

so the largest number that always divides x²-8x is 0