Question

Calcule:
a)- (3+x)2=

b)-(x+y)-(x-y)=​

Answer 1

Resposta:

a) - ( 6 + 2x) = 0

-6 -2x=0

-2x= 6

X = 6/ -2

x= -3

b) -x-y-x+y

-2x =0

X =0