Question

Observando o exemplo,efetue as expressões:
a)(x+2)2=
b)(x-4)2=
c)(x-1).(x+1)=
d)(x-3).(x+3)=

Answer 1

a) 2x+4=0
2x= -4
x= -4/2
x= -2

b) 2x-8= 0
2x= 8
x= 4

c) x^2 +x -x -1=0
x^2 -1=0
x^2=1
x=1

d) x^2 +3x -3x -9=0
x^2=9
x=3