Evaluate the integral. Check your result by differentiation. Step 1 3x dx J (552) Notice that the numerator of the integrand is a constant multiple of x4 and the derivative of 5x-2 is also a constant multiple of x. This suggests that the integral can be the form S un du. Therefore, we let u 2 5-2 and du-25x4 dx. 25 Step 2 We need du 25x dx, but our integrand instead has a factor of 3x4 dx. Therefore, we need to multiply by a constant value that will give us the necessary expression for c 3x4 dx- (5x5 234 )25x+ dx -25x dx