dx (3 + 4x – 4x²)/2

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter6: Fractions
Section6.1: Simplifying Fractions
Problem 38WE
Question
Evaluate the integral
.2
32.
dx
2\3/
(3 + 4х — 4х?)/2
Transcribed Image Text:.2 32. dx 2\3/ (3 + 4х — 4х?)/2
Expert Solution
Step 1

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\int \:\frac{x^2}{\left(3+4x-4x^2\right)^{\frac{3}{2}}}dx

=\int \frac{x^2}{\left(-4x^2+4x+3\right)^{\frac{3}{2}}}dx

=\int \frac{x^2}{\left(-4\left(x^2-x\right)+3\right)^{\frac{3}{2}}}dx

add and subtract 1/4

=\int \frac{x^2}{\left(-4\left(x^2-x+\frac{1}{4}-\frac{1}{4}\right)+3\right)^{\frac{3}{2}}}dx

=\int \frac{x^2}{\left(-4\left(\left(x-\frac{1}{2}\right)^2-\frac{1}{4}\right)+3\right)^{\frac{3}{2}}}dx

=\int \frac{x^2}{\left(-4\left(x-\frac{1}{2}\right)^2+1+3\right)^{\frac{3}{2}}}dx

=\int \frac{x^2}{\left(-4\left(x-\frac{1}{2}\right)^2+4\right)^{\frac{3}{2}}}dx................(1)

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