Enter (A,B,C) in order below if A, B, and C are the coefficients of the partial fractions expansion of (2x^2 + 3x - 5)/(x(x^2 - 1)) = A/x + B/(x - 1) + C/(x + 1).
2x2+3x−5x(x2−1)=Ax+Bx−1+Cx+1
multiply both sides by x(x2−1):
2x2+3x−5=A(x−1)(x+1)+B(x)(x+1)+C(x)(x−1)
Notice that if you set x to equal 0, 1, and -1, respectively, you can cancel out two of the 3 coefficients, which will make it easier to solve. First, set x = 0:
−5=−AA=5
Now set x = 1:
2+3−5=2BB=0
Lastly, set x = -1:
2−3−5=2C−6=2CC=−3
Therefore, the answer is (5,0,−3)