Question

simplifique as expressões reduzindo os termos semelhantes :

Answer 1

c)2y^3-3y+2,5y^3-2y=4,5y^3-5y ou 9/2y^3-5y (obs:9/2=4,5)

d)a-(b-c-2a)+b=a-b+c+2a+b=3a+c

e)x-y-(x-y)=x-y-x+y=0

f)x^2-b^2-(x^2-b^2)=x^2-b^2-x^2+b^2=0