Question

1) Determine o valor de X
2) Calcule as medidas desconhecidas

Answer 1

______________________________

1)

A)

3/x = 2x/x + 3

3x + 9 = 2x²

-2x² + 3x + 9 = 0

x = -3 ± √9 - 4(-2)(9)

2(-2)

x = -3 ± √9 + 72

-4

x = -3 ± √81

-4

x = -3 ± 9

4

x1 = 6/4 = 3/2

x2 = -12/4 = -3

Números naturais

X = 3/2

B)

6/x = 2/3

2x = 6 . 3

2x = 18

x = 18/2

x = 9

______________________________

2)

A)

7 . 4 = 2 . x

2x = 28

x = 28/2

x = 14

B) x/6 = 12/8

8x = 72

x = 72/8

x = 9

______________________________