Question

simplifique as expressoes abaixo:
A) 2x ( x - 3 ) + x ( x - 5 )
B) ( x - 3 ) . ( x - 5 ) + 3x ( x + 4 )
C) ( a + b ) . ( a - b ) + ( a - 2b ) . ( a + 5b )

Answer 1

Resposta:

a)

$3{x}^{2} - 11$

b)

$4 {x}^{2} + 4x + 15$

c)

$2 {a}^{2} - 11{b}^{2} + 3ab$