Question

A diferença (20x3 - 10x2 + x ) - ( 5x3 - 3x2 + 7)
e igual a:​

Answer 1

Resposta:

Explicação passo-a-passo:

(20 * 3 - 10 * 2 + x ) - ( 5 * 3 - 3 * 2 + 7) =

( 60 - 10 * 2 + x ) - ( 5 * 3 - 3 * 2 + 7) =

( 60 - 20 + x ) - ( 5 * 3 - 3 * 2 + 7)  

( 60 - 20 + x ) - ( 15 - 3 * 2 + 7) =

( 60 - 20 + x ) - ( 15 - 6 + 7) =

( 60 - 20 + x ) - ( 16 ) =

( 40 + x ) - ( 16 ) =

40 + x - 16 =

x = -40 + 16

x = -24