Hi guys! This video discusses how to evaluate a function at a specific value as well as the different operations we can do with functions. To evaluate a function at a certain number or value, we simply substitute that number to all the independent variable, say x, of the functions. We also have different oeprations on functions such as addition, subtraction, multiplication, and division. We can also assign value to independent variables when doing operations aon functions. Lastly, we have the conposition of functions. When finding the composite function, given atleast two functions, we evaluate a certain function at another function. We solve different example on evaluation and operations of functions. Happy learning and enjoy watching. #tagalog #math #boardexamreview