Question

Simplifique as expressões.
a) (x - 4)2 – (x - 1)
b) (x + 1)2 – (x - 2)2
c) (-x + 3)2 - 2x(4 - x)​

Answer 1

Resposta:

a) (x-4)2 - (x-1) =

2x-8 - x + 1

2x - x - 8 + 1

x -7

b) (x+1)2 - (x-2)2

2x + 1 - (2x - 4)

2x + 1 - 2x + 4

2x - 2x + 1 + 4

5

c) (-x+3)2 - 2x(4-x)

-2x + 6 - 8x + 2x²

2x² - 2x - 8x + 6

2x² - 10x + 6

x² - 5x + 3