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-x(x² - x - 6)= 0
-x(x-3)(x-2) = 0
x = 0 , x =2, x = 3
Luas =
= - ∫ -x³+x²+6x dx |0..-2) + ∫-x³+x²+6x dx | 3..0|
= - [ -1/4x^4 + 1/3 x^3 + 3x^2| 0.-2| + [-1/4x^4 + 1/3 x^3 + 3x^2|3.0|
= - { -1/4(-16) + 1/3(8) + 3(-4) } + {-1/4(64) + 1/3(27) + 3(9)]
= -(- 16/3) + 52
= 57 1/3 satuan luas