Yes, now solve the quadratic using your preferred method
Because you squared the equation you may have introduced some extraneous solutions so check any answers you get against the original question. In other words
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What I'm stupid. I don't know how to solve 1+24 finding D. I know how to solve this. It's my fault.
Tam-ta-dam... I am a dummy again!
I Need A Break! Thanks for help me to understand this.