Question

Determine a raiz ou o zero das funções:

a) y= 4x-8

b) y= -7x+21

Answer 1

$a)y=4x-8=> 4x-8=0 => x= \frac{8}{4} => x=2\\b)y=-7x+21 => -7x+21=0 => x= \frac{21}{7}=> x=3$