Question

MIM ajudem pelos menos essa 2 pfv​

Answer 1

Resposta:

2) a) 2x + 4

B) 2 - 3x

C) x = -2/5

3) 5.(9+y)=20-3+6y

45 + 5y = 20-3+6y

45-17=y

Y=28

4) 2x.(4-3x)=2

8x-6x^2=2

-6x^2 + 8x - 2 = 0

∆= 8^2 -4.-6.-2

∆=64 -48

∆=16

X = (-b +-√∆)/2a

X,= (-8 + 4)/-12

X,= -4/-12

X,= 1/3

X,,= (-8-4)/-12

X,,= -12/-12

X,,= 1