Consider the integral 2 x x 1 da In the following we will evaluate the integral using two methods A First rewrite the integral by multiplying out the integrand 2 x x 1 dx s Then evaluate the resulting integral term by term 22 2 x x 1 dx B Next rewrite the integral using the substitution w 2 x x 1 dx 23 2 1 da dw Evaluate this integral and back substitute for w to find the value of the original integral 2 x x 1 dx C How are your expressions from parts A and B different What is the difference between the two answer from B answer from A Are both of the answers correct