(х-4)^2-х(х-2), при Х=1,2

Question

(х-4)^2-х(х-2), при Х=1,2

Answer 1

(x-4)² - x*(x-2) = x²-8x+16-x²+2x = 16-6x
16-6*1,2 = 16-7,2 = 8,8

Answer 2

Х^2-8x=16-x^2=2x=-6x+16=-6*1.2+16=7.2+16=23.2