Five times a number decreased my eight is at most ten more than twice the number

If an x intercept only touches the x axis it means it has a multiplicity of 2. if an intercept goes through the axis it has a multiplicity of 1 true false

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25