Final answer:
The question contains typos, making it unclear. It appears to be a math problem that might involve solving for variables by using known values and algebraic methods, potentially related to physics concepts such as velocity and the speed of light.
Step-by-step explanation:
The question relates to solving an equation for variables c and d. However, due to typos and missing context, it is impossible to provide an exact answer. Guidelines to solve a question like this usually involve identifying the known values and the unknown variables, and then solving the equation using algebraic methods or substitutions.
If we make an assumption based on the provided context, for instance, that we are dealing with a physics problem involving velocity (v) and the speed of light (c), then the steps would involve setting up the equation with the knowns and solving for d or v in terms of c.
An example equation given is x² c² ₁² = x²² c²+¹². A student might be tasked with solving for a variable in terms of c, the speed of light. It is essential to isolate the variable you are attempting to solve for and then apply the appropriate algebraic methods to derive its value.