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Question
Multiply:
(2x + 5y) and (2x + 5y)
Sum
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Solution
(2x + 5y) × (2x + 5y)
= 2x × (2x + 5y) + 5y × (2x + 5y)
= 4x2 + 10xy + 10xy + 25y2
= 4x2 + 20xy + 25y2
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