Jika (7x+2y)² = ax²+bxy+cy², maka nilai a+b+c =....
Matematika
windadayani25
Pertanyaan
Jika (7x+2y)² = ax²+bxy+cy², maka nilai a+b+c =....
2 Jawaban
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1. Jawaban 41ni
Jawaban ada di lampiran2. Jawaban Clara01Cc
(7x+2y)²
(7x+2y) . (7x+2y)
49x² + 14xy + 14xy + 4y²
49x² + 28xy + 4y²
49x² + 28xy + 4y² = ax²+bxy+cy²
a + b + c =
49 + 28 + 4 = 81
