Question

Considerando:
a) y= 5x + 2
b) y= -2x
c) y= (x + 2)² - (x - 1)²
* Determine os zeros das funções;

Answer 1

a) y= 5x + 2  

5x + 2 = 0

5x = -2

x = -2/5

b) y= -2x  

-2x  = 0, x = 0

c) y= (x + 2)² - (x - 1)²

x² + 4x + 4 - x² - 2x - 1 = 0

2x + 3 = 0

2x = -3,   x = -3/2