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Sagot :

1.

A pelouse = A - A massif

A pelouse = l × L - c²

A pelouse = 12 × 25 - x²

A pelouse = 300 - x²

2.

• A pelouse = 300 - 8²

A pelouse = 300 - 64

A pelouse = 236 m²

• A pelouse = 300 - 10²

A pelouse = 300 - 100

A pelouse = 200 m²

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