Answer:
Step-by-step explanation:
<u>Subtract 6 from both sides of the equation:</u>
<u>Subtract 6 from itself which will give you 0.</u>
<u>Subtract 6 from 15 :</u>
<u>Square both sides of the equation:</u>
<u>Subtract 6 from both sides of the equation:</u>
<u>Subtract 6 from 81:</u>
<u>Divide both sides by -15:</u>
<u>___________________________</u>