Question

1.Efetue
a) 5x + 2
+ 3x - 1

b) 2x + 3
+ -7x + 4

c) 5x² - 7x + 10
+ -3x² - 5x - 8

Answer 1

Resposta:

A) 5x + 2 + 3x - 1

5x + 3x = 2 - 1

8x = 1

× = 8/1 = 8

B) 2x + 3 + -7x + 4

2x + 7x = 3 - 4

9x = 1

× = 9/1 = 9

C) 5x^2 - 7x + 10 + -3x^2 - 5x - 8

25x - 7x + 10 + -9x - 5x - 8

25x - 7x + 9x + 5x = 10 + 8

18x + 9x + 5x = 10 + 8

27x + 5x = 10 + 8

32x = 10 + 8

32x = 18

× = 32/18 = 1

Explicação passo-a-passo:

Espero ter lhe ajudado!!!

;P