Question

Sendo A= 3x2+5x determine o valor A para a base 3

A) x=-2

B) x=2-1

Answer 1

a)

3x² + 5x

x = - 2
= 3.(-2)² + 5.(-2)
= 3.4 - 10
= 12 - 10
= 2

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b)
x = 2 - 1
x = 1

= 3x² + 5x
= 3.1² + 5.1
= 3.1 + 5
= 3 + 5
= 8