Final answer:
The quadratic equation can be solved using the quadratic formula, and rearranging an algebraic expression involves inverse operations to isolate the desired variable.
Step-by-step explanation:
The solution to quadratic equations of the form ax² + bx + c = 0 is given by the quadratic formula, which is: -b ± √b² - 4ac over 2a. For example, when you substitute the values a = 3, b = 13, c = -10 into this formula, you get the roots of the equation after performing the operations under the radical sign and the division by 2a.
To solve for 'a' in the equation W = 3(2a+b)-4, you would first expand this equation and then isolate 'a' on one side of the equation by moving all other terms to the opposite side. This involves basic algebraic manipulation such as distribution, addition, subtraction, and division.