I am stuck here on this problem, it should be in the six stepts of quadratic equations.

$a{x}^{2}-2x-13=0\phantom{\rule{0ex}{0ex}}{x}^{2}+2x=13\phantom{\rule{0ex}{0ex}}4{x}^{2}+8x=52\phantom{\rule{0ex}{0ex}}4{x}^{2}+8x+4=52+4\phantom{\rule{0ex}{0ex}}4{x}^{2}+8x+4=56$

$a{x}^{2}-2x-13=0\phantom{\rule{0ex}{0ex}}{x}^{2}+2x=13\phantom{\rule{0ex}{0ex}}4{x}^{2}+8x=52\phantom{\rule{0ex}{0ex}}4{x}^{2}+8x+4=52+4\phantom{\rule{0ex}{0ex}}4{x}^{2}+8x+4=56$