If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Equation that has a specific extraneous solution

Sal finds the value of d for which √(3x+25)=d+2x has an extraneous solution at x=-3.

Video transcript