Resolve resolve 3x-1/(x-1) (x²-x+1) into partial fractions please
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(x−1)(x+2)29=x−1A+x+2B+(x+2)2C
=>9=A(x+2)2+B(x−1)(x+2)+C(x−1) -(1)
For x=1,=>9=A(3)2+B(0)+C(0)
=>9=9A
=>A=1 - (2)
For x=−2,=>9=A(0)+B(0)+C(−2−1)
=>9=−3C
=>C=−3 -(3)
Now , we have found out value of A and C , to find value of B , put x = any real number .
Let x =0 , then equation (1) reduces to 9=4A−2B−C
=>9=4−2B
=>2=−2B
=>B=−1 -(4)
Therefore from (2),(3),(4) we get (x−1)(x+2)29=x−11−
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