https://youtu.be/zRlUkijc9l0 Solving radical equations can be tricky, especially if you forget to check your solutions. Which is what I used to do in high school... Pay attention to this...

https://youtu.be/GSZYLt5K90U

https://youtu.be/H6vK8WcloKI Learn how to use the second derivative to classify critical values.

https://youtu.be/ugKgPrCgveg

https://youtu.be/0ZPTk_nUNgE

https://youtu.be/ZTUAnU9EVQ0?si=-o0xKX3VBg2HUKbM