Question

1-Determine o zero da função :
A) y=2x – 15 / 3
B) y=3x + 75 / 3
C) y=2x – 2 / 2

Answer 1

A) y=2x – 15 / 3 
0=2x-15/3
2x=15/3
6x=15
x=15/6
B) y=3x + 75 / 3 
0=3x+75/3
3x=-75/3
x=-75÷3/9÷3 (simplificando)
x=-25/3
C) y=2x – 2 / 2
0=2x-2/2
x=1/2