Question

gente me ajudem pfv

Answer 1

$x^2-...............+121= (x-.....)^2 \\ \\ x^2-.... \boxed{22x}...+121= (x- \boxed{11} )^2 \\ \\ \\ 9m^2+6mk+......= (.....+k)^2 \\ \\ 9m^2+6mk+k^2= (3m+k)^2 \\ \\ 9m^2+6mk+ \boxed{k^2}= ( \boxed{3m}+k)^2 \\ \\ \\ \\( 4a+b )(4a-....)= ....-b^2 \\ \\ (4a+b)(4a- \boxed{b})= \boxed{16a^2} - b^2$