Question

2) Calcule reduzindo os seguintes termos semelhantes:

a) 5x – 6y +2x – 8y =











b) -8a + 11b -3a +b =






c) x² +9x - 4 -2x² -9x +7 =







d) -8z – 10x -2y+ 3x – 5y +7z =

Answer 1

Resposta:

A) 5x – 6y +2x – 8y =

5x + 2x - 6y - 8y =

7x - 14 y =

B) -8a + 11b -3a +b =

- 8a - 3a + 11b + b =

- 11a + 12b =

C) x² +9x - 4 -2x² -9x +7 =

- x^2 + 0 + ( -4 + 7 ) =

- x^2 + 0 + 3 =

- x^2 + 3 =

D) -8z – 10x -2y+ 3x – 5y +7z =

( - 8z + 7z ) - 10x + 3x - ( 2y - 5y ) =

-1z - 7x - 7y =

Answer 2

a) 5x - 6y + 2x - 8y =

a) = 7x - 14y

b) - 8a + 11b - 3a + b =

b) = - 11a + 12b

c) x² + 9x - 4 - 2x² - 9x + 7 =

c) = - x² + 3

d) - 8z - 10x - 2y + 3x - 5y + 7z =

d) - z - 7x - 7y