Question

Multiplica a.b ,sendo :
A=2x+3x+4 e b=-4x-x+3

Answer 1

(2x + 3x+ 4) . (-4x - x + 3) = 

-8x - 2x + 6x - 12x - 3x + 9x - 16x - 4x + 12 =

-30x + 12

#Esperoterajudado

Answer 2

a=2x+3x+4 ==> a = 5x + 4

b=-4x-x+3 ==> b= - 5x + 3

a.b= (5x+4)(- 5x + 3) ==> -25x^2 + 15x - 20x + 12 ==>   - 25x^2 - 5x + 12