Question

solve this equation ​

Answer 1

For equal roots D=0

${(2(p - 12))}^{2} - 4(p - 12)(2)$

$4( {p - 12)}^{2} - 4(p - 12)(2) = 0 \\ {(p - 12)}^{2} - 2(p - 12) = 0 \\ (p - 12)(p - 12 - 2) = 0 \\ (p - 12)(p - 14) = 0 \\ p = 12$

or

$p = 14$

FOR P=12 EQUATION GIVES

$2 = 0$

that is not possible

So answer is

$p = 14$