Final answer to the problem
Step-by-step Solution
How should I solve this problem?
- Integrate by trigonometric substitution
- Integrate by partial fractions
- Product of Binomials with Common Term
- FOIL Method
- Integrate by substitution
- Integrate by parts
- Integrate using tabular integration
- Weierstrass Substitution
- Prove from LHS (left-hand side)
- Solve by quadratic formula (general formula)
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Find the integral
Learn how to solve integral calculus problems step by step online.
$\int\left(x^2-81\right)dx$
Learn how to solve integral calculus problems step by step online. Factor the expression x^2-81. Find the integral. Expand the integral \int\left(x^2-81\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int x^2dx results in: \frac{x^{3}}{3}. The integral \int-81dx results in: -81x.