Question

determine o zero das funções
a)y=-4x+8
b)y=-3x-21

Answer 1

a) -4x +8 = 0 .(-1)

4x = 8

x = 8/4

x = 2

b) -3x -21= 0 .(-1)

3x= 21

x = 21 / 3

x = 7