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Sagot :

Bonsoir,

1)

-2

-2+4 = +2

2*-2 = -4

-4 +4 = 0

2)

5

5+4 = 9

9*5 = 45

45 + 4 = 49 =7²

3)

6

6+4 = 10

10*6 = 60

60+4 = 64 = 8²

2

2+4 = 6

6*2 = 12

12 +4 = 16 = 4²

4)

x

x+4

x(x+4) = x² +4x

x² +4x +4=

( x+2) ²

Donc , oui

5)

(x+2) ² = 1

=> x+2 = 1

x= 1-2

x= -1

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