Question

6 Resolva as equações.
a) (x + 5)2 = 16
b) (x + 5)2 = 9
c) (x + 5)2 = 4
d) (x + 5)2 = 1
e) (X - 5)2 = 0
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Answer 1

a) 2x+10=16

2x=16-10

x=6/2

x=3

b)2x+10=9

2x=9-10

2x=-1

x=-1/2

c)2x+10=4

2x=4-10

2x=-6

x=-6/2

x=-3

d) 2x+10=1

2x=1-10

2x=-9

x=-9/2

e) 2x-10=0

2x=10

x=10/2

x=5