Question

corrija as sentenças falsas :
 a) x+m)²=x²+2xm+m²
 b) (x-m)²=x2-m² 
c) (a-4)²=a²-8a+8 
d) (a+4)²=a²+8a+16
 e) (-a-4)²=16+8a+a²

SOCORROOOOOOOOOOO 

Answer 1

 a) (x+m)²=x²+2xm+m²    ok
 b) (x-m)²=x2-m²            x²-2mx+m²
c) (a-4)²=a²-8a+8          a²-8a+16
d) (a+4)²=a²+8a+16      ok
 e) (-a-4)²=16+8a+a²     ok