Question

determino o zero da raiz de:
a)y=-2x+10
b)y=3x+9

Answer 1

a)

-2x + 10 = 0

2x = 10

x = 10/2

x = 5

b)

3x + 9 = 0

3x = -9

x = -9/3

x = -3

Answer 2

Basta igualar y a zero e encontrar o valor de x.

a) y = -2x + 10
0 = -2x + 10
2x = 10
x = 10/2
x = 5

b) y = 3x + 9
0 = 3x + 9
-9 = 3x
x = -9/3
x = -3