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Question

Resolve x4(x1)(x2) into partial fractions.

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Solution

x4(x1)(x2)
=((x1)(x2))x4(x1)(x2)
=(x1)x4(x1)(x2)(x2)x4(x1)(x2)
=x4(x2)x4(x1)
=(x2+2)(x)3(x2)(x1+1)x3(x1)
=x3+2x3x2x3x3x1
=2x3x2x3x1
=2(x2+2)x2x2(x1+1)x2x1
=2x2+4x2x2x2x2x1
=x2+4(x2+2)xx2(x1+1)xx1
=x2+4x+8xx2xxx1
=x2+3x+8(x2+2)x2x1+1x1
=x2+3x+8+16x211x1
=x2+3x+7+16x21x1

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