Question

Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation?

Answer 1

It equals zero 2x2-12x-15=0

Answer 2

$2=12x-15 \ \textgreater \ Switch\;sides\; \ \textgreater \ 12x-15=2 \ \textgreater \ \mathrm{Add\:}15\mathrm{\:to\:both\:sides}$

$12x-15+15=2+15 \ \textgreater \ 12x=17 \ \textgreater \ \mathrm{Divide\:both\:sides\:by\:}12$

$\frac{12x}{12}=\frac{17}{12} \ \textgreater \ x=\frac{17}{12}$

Hope this helps!