Question

A= 3x+4y
B= 5x-3y

responda:

a)A-B
b)B-A
c)A.B​

Answer 1

Resposta:

a) -2x+7y   b) 2x-7y   c) 15x^2+11xy-12y^2

Explicação passo a passo:

a) (3x+4y)-(5x-3y)

= 3x+4y-5x+3y

=-2x+7y

b) (5x-3y) - (3x+4y)

= 5x-3y-3x-4y

=2x-7y

c) (3x+4y)*(5x-3y)

3x*5x+3x*(-3y)+4y*5x+4y*(-3y)

15x^2-9xy+20xy-12y^2

=15x^2+11xy-12y^2