X - 2y = 10 Y = X kuadrat + 2x - 15
Matematika
fahmygym
Pertanyaan
X - 2y = 10
Y = X kuadrat + 2x - 15
Y = X kuadrat + 2x - 15
1 Jawaban
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1. Jawaban akhiruaini
Y = x² + 2x - 15
x - 2y = 10
x - 2(x² + 2x - 15) = 10
x - 2x² - 4x + 30 = 10
-2x² - 3x + 30 = 10
2x² + 3x - 20 = 0
( 2x - 5) (x + 4)
x1 = 5/2 y1 = -15/4
x2 = -4 y2 = 7
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