amelvin41
08.03.2020 •
Mathematics
Fill in the blanks. Please answer as shown in the boxes. Please fill out all boxes. Will mark brainiest if correct
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Ответ:
(5x + 7y)² = 25x² + 70xy + 49y²
Step-by-step explanation:
(5x + 7y)² = 25x² + 70xy + 49y²
Because,
(5x + b)² = (5x)² + 2(5x)(b) + b²
2(5x)(b) = 70xy
b = 7y
b² = (7y)² = 49y²
Ответ:
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Step-by-step explanation:
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