sederhanakanlah (3x-4y) (x+y) + (5x+7y)(x-y)
Matematika
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Pertanyaan
sederhanakanlah (3x-4y) (x+y) + (5x+7y)(x-y)
1 Jawaban
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1. Jawaban fatimah3085
(3x - 4y)(x + y) + (5x + 7y)(x - y)
= (3x² - 4xy + 3xy - 4y²) + (5x² + 7xy - 5xy - 7y²)
= (3x² - xy - 4y²) + (5x² + 2xy - 7y²)
= 8x² + xy - 11y²