Question

simplifique as expressões:
(m+1)²+(m-1)²+2(m+1)(m-1)
(y+1)(y-1)+(y+2)(y-2)+(y-4)(y+4)

Answer 1

(m+1)²+(m-1)²+2(m+1)(m-1)=0
(m+1).(m+1)+(m-1).(m-1)+(m+1).(m-1)=0
m²+1m+1m+1+m²-1m-1m+1+m²-1m+1m-1=0
3m²+1=0

(y+1).(y-1)+(y+2).(y-2)+(y-4).(y+4)=0
y²-1y+1y-1+y²-2y+2y-4+y²+4y-4y-16=0
3y²-21=0