 If you open the graph x plus half x, we have done a silly substitute A x square, easy to solve. Alright. In this term, if it says t, this along with tx will become dt, so it will be just like under root t dt. Into under root t dt. And this you can complete the square example, that will be more clear to you. This is half. So, instead of x plus 3, I will write half to x plus 2 plus 2 into under root plus the same term which is x squared, rational functions using partial fractions, and irrational functions. Thank you so much.