<p>I know this might not be relevant to test prep but I have a test tomorrow and I'm panicking!!!!!!!!! Anyone know how to solve (tan2x)^2-2tan2x-5=0, using the calculator but no graphing?? Sorry, I have no clue!!!!!! Please explain the steps on how you would solve a quadratic like this.</p>
<p>Use u substitution. Sub in u for tan2x. Solve the equation for u. Then use substitution to solve for x.</p>
<p>Thank you sooooo much! I’m sooooo dumb, I didn’t think of that. Really appreciate it</p>