Sagot:
#a + b + c = 9 #
Paliwanag:
Ibinigay: # (x ^ 2-5x-6) / (x ^ 3 + ax ^ 2 + bx + c) = 1 / (x-2) #
Sinusunod nito na:
# (x ^ 2-5x-6) (x-2) = x ^ 3 + ax ^ 2 + bx + c #
Multiply
# x (x ^ 2-5x-6) - 2 (x ^ 2-5x-6) = x ^ 3 + ax ^ 2 + bx + c #
# x ^ 3-5x ^ 2-6x - 2x ^ 2 + 10x + 12 = x ^ 3 + ax ^ 2 + bx + c #
Pagsamahin ang mga termino:
# x ^ 3-7x ^ 2 + 4x + 12 = x ^ 3 + ax ^ 2 + bx + c #
Pagtutugma ng mga coefficients:
#a = -7, b = 4, at c = 12 #
#a + b + c = -7+ 4 + 12 #
#a + b + c = 9 #