Simplify Integral Expression: Step 1: Simplify the integral expression.We start by noticing that the integral can be simplified by partial fractions, but first, let's check if direct integration is possible.The integral is ∫x2−4x2dx.
Attempt Direct Integration: Step 2: Attempt direct integration.We attempt to simplify the integrand:x2−4x2=1+x2−44.Now, we integrate each part separately:∫x2−4x2dx=∫1dx+∫x2−44dx.
Integrate First Part: Step 3: Integrate the first part.The integral of 1 with respect to x is x.So, ∫1dx=x.
Integrate Second Part: Step 4: Integrate the second part using partial fractions.We decompose x2−44 into partial fractions:x2−44=(x−2)(x+2)4=x−2A+x+2B.Solving for A and B, we find A=1, B=1.So, x2−44=x−21+x+21.Now, integrate:∫x2−44dx=∫(x−21+x+21)dx=ln∣x−2∣+ln∣x+2∣+C.
Combine Results: Step 5: Combine the results.The integral of the original function is:∫x2−4x2dx=x+ln∣x−2∣+ln∣x+2∣+C.
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