Question

Determine os zeros da função:
a) y = 9x + 6
b) f(x) = + 2x + 10
c) y = (x + 2) 2 – (x – 1) 2
d) f(x)= -2x+9
e) f(x)= -8x
f) f(x)= 2x+12

Answer 1

Resposta:

A) x = 2/3

X = 5

C) ( 5, 2/5)

D)X = 9/-2

E) - 8x

F) x = 6

Explicação passo-a-passo:

A) 9x +6

X =6/9:³

X = 2/3

B) +2x=+10

X = 10/2

X=5

C) (-2x + 2)² - (x - 1)²=.

(-2x + 2)(-2x + 2) - (X - 1)(x - 1)=

+4x² - 4x - 4x +4 - X² +x +x +1=

+4x² - 8x +4 - X² +2x +1 =

4x²-x² - 8x +2x +4 +1 =

X² - 6x +5=

6±√6² - 4.1.5/2

6±√36 - 20/2

6±√16 /2

6±4/2

X¹=10/2= 5

X²=2/5

D) - 2x +9

X = 9/-2

F) 2x = 12

X = 12/2

X = 6