(x-6)^2-(x+2)(x+8) = (-0.5-6)^2-(-0.5+2)(-0.5+8)= (-6.5)^2-(-0.5+2)(7.5)= 42.25-(1.5)(7.5)= 42.25-11.25= 31
(x-6)^2-(x+2)(x+8) = (-0.5-6)^2-(-0.5+2)(-0.5+8)
= (-6.5)^2-(-0.5+2)(7.5)
= 42.25-(1.5)(7.5)
= 42.25-11.25
= 31