Question

simplifique as expressões

Answer 1

a) (x-4)²-(x-1)²
x²-2.x.4+(-4)²-(x²-2.x.1+(-1)²
x²-8x+16-x²+2x+1
-8x+2x+17

b) (x+1)²-(x-2)²
x²+2x+1-x²+4x+4
2x+4x+4+1
6x+5

c) (-x+3)²-2x(4-x)
(3-x)²-8x+2x²
9-6x+x²-8x+2x²
3x²-14x+9