Tutorial Exercise Find the indefinite integral by the method shown in Example 4 x 9 Step 1 x 9 7 7 x dx The given integral is easier to integrate Hence define U fax x 9 7 x dx Define a function in terms of u such that the term under the square root is X Differentiate the equation with respect to x du dx Step 3 Simplify the right side dx Step 2 Substitute the terms containing x in the integrand with terms containing u and rewrite the integral in terms of u x 9 7 x dx S 7 u x 9 7 x dx 1 7 u 9 u du Co Do 7 u 9 u du