x² + y² = -20 xy = -12 (x-y) = ?
Matematika
TwinklingExo12
Pertanyaan
x² + y² = -20
xy = -12
(x-y) = ?
xy = -12
(x-y) = ?
1 Jawaban
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1. Jawaban Jackye
(x-y)²=x²+y²-2xy= -20-2(-12)= 4
x-y =√4=2