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2x² - 6x = 0
2x (x - 3) = 0
x = 0 atau x = 3
Luas daerah yang dibatasi kedua kurva
......₃
L = ∫ (6x - x² - x²) dx
.....⁰
......₃
.. = ∫ (6x - 2x²) dx
.....⁰
...........................₃
.. = 3x² - ⅔ x³ |
...........................⁰
.. = 3(3)² - ⅔ (3)³
.. = 27 - 18
.. = 9 satuan luas
Langkah singkatnya
dari bentuk 2x² - 6x = 0
cari D = b² - 4ac = (-6)² - 0 = 36
Luas L = D√D / 6a² = 36√36 / 6(2)² = 9 satuan luas
semoga bisa membantu