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Sagot :

F= (x + 5)²

=x² + 10x + 25

G= (2x + 7)²

4x² + 28x + 49

H= (z-8)²

=z² - 16z + 63

I = (9x - 4)²

81x² - 72x + 16

J = (6x + 5)² + (2x - 3)²

= 36x² + 60x + 25 + 4x² - 12x +9

= 40x + 48x + 34

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