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Sagot :
Answer: (a + b)² = 50
Step-by-step explanation:
(a + b)² = (a + b)(a + b)
= a² + ab + ab + b²
So, (a + b)² = a² + b² + 2ab
Then substitute the value of ab and (a² + b²)
(a + b)² = 30 + 2(10)
= 30 + 20
Therefore, (a + b)² = 50
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