Question

Simplifique as expressões a seguir.

A) (x - 1) - (x + 1)


B) (x -3) - (x + 2) + (x + 3)(x - 1)


pfv Me ajude!

Answer 1

$A) (x-1)-(x+1)=x-1-x-1=-2 \\ \\ \\ B) (x-3)-(x+2)+(x+3)(x-1)= \\ \\ =x-3-x-2+(x^2-x+3x-3)= \\ \\ =-5+x^2-x+3x-3= \\ \\ =x^2+2x-8$

Answer 2

A)
= (x - 1) - (x + 1)

= x - 1 - x - 1

= x - x - 1 - 1

= - 2

*****************

B)
= (x - 3) - (x + 2) + (x + 3).(x - 1)
= x - 3 - x - 2 + x² - x + 3x - 3
= x - x - 3 - 2 + x² + 2x - 3
= - 5 + x² + 2x - 3
= x² + 2x - 3 - 5
= x² + 2x - 8