Question

$root of ( 2x {}^{2} - 3x + p \:) \: is \: 3. \: find \: p$

Answer 1

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hello Friend}}}$

Here is your answer
$2x {}^{2} - 3x + p = 3 \\ if \: root \: is \: 3 \: so \: put \: x = 3 \\ 2(3) {}^{2} - 3 \times 3 + p = 3 \\ 18 - 9 + p = 3 \\ 9 + p = 3 \\ p = 3 - 9 \\ p = - 6$
Hope it helps you