- #1
tessa127
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Homework Statement
integrate (4x+3)/(x^2+4x+5)^2
Homework Equations
The Attempt at a Solution
I know to solve this problem you have to work with partial fractions, in the solution we were given they solve as followed
4x+3=A(x^2+4x+5)'+B
I don't know why they take the derivative of x^2+4x+5
thank you in advance!