Question

simplifique as expressões a) (x-4)²-(x-1)²

Answer 1

(x-4-(x-1))×(x-4+(x-1))
(x-4-x+1)×(x-4+x-1)
-3(2x-5)

Answer 2

a)x²-8x+16 - (x²-2x+1)=  x²-8x+16 - x²+2x-1=  -6x+15