Question

determine os zeros das seguintes funçoes do 1 grau a) y=x-3 b) y=2x+1 c) y=4-2x d) y=-7x+7 e) y= x+5 f )y=1/2x-2

Answer 1

Determine os zeros das seguintes funçoes do 1 grau
IGUALAR a zero

a) y=x-3

X - 3 = 0
X = + 3
x = 3

 b) y=2x+1

2x + 1 = 0
2x = - 1
x = -1/2

 c) y=4-2x
4 - 2x = 0
- 2x = - 4
x = - 4/-2
x = + 4/2
x = 2

 d) y=-7x+7

- 7x + 7 = 0
- 7x = - 7
x = - 7/-7
x = + 7/7
x = 1

 e) y= x+5
x + 5 = 0
x = - 5

 f )y=1/2x-2

1/2x - 2 = 0

1x
--- - 2 = 0
2

1x
----- = + 2
2

1x = 2(2)
1x = 4
x = 4/1
x = 4