X² = 25 x² + 2 = 51 (x+1)² = 9 x² = -16 2x+¹ = 16 5² -x = 25 (...

Ola eriica

x² = 25

x1 = 5
x2 = -5



x² + 2 = 51

x² = 49

x1 = 7
x2 = -7



(x + 1)² = 9

x1 + 1 = 3
x1 = 2

x2 + 1 = -3
x2 = -4



x² = -16

x1 = -4i
x2 = 4i 



2^(x + 1) = 16 = 2^4

x + 1 = 4
x = 3



5² - x = 25

x = 25 - 25 = 0



x + 1 = x + 2

impossível



(2x)³ = 64 

2x = 4

x = 4/2 = 2



(2x+1)*(3x+3) = 0

2x1 + 1 = 0

2x1 = -1

x1 = -1/2

3x2 + 3 = 0

x2 = -1



x³ = -8

x = -2



0*x = 0 

x pertence ao conjunto R

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