Question

Velho me ajudem por favor ​

Answer 1

Resposta:

$a) \: {(2 + 9x)}^{2} \\ 4 + 36x + 81 {x}^{2} \\ 81 {x}^{2} + 36x + 4$

$b) \: {(3x + \frac{2}{3} a)}^{2} \\ \\ 9 {x}^{2} + 4ax + \frac{4}{9} {a}^{2}$

$c) \: ( {a}^{3} + 6 {y}^{2} ) {}^{2} \\ {a}^{6} + 12 {a}^{3} {y}^{2} + 36 {y}^{4}$

$d) \: {( {m}^{2} + 2 {n}^{3} ) }^{2} \\ {m}^{4} + 4 {m}^{2} {n}^{3} + 4 {n}^{6}$

$e) \: {(3ab + 1)}^{2} \\ 9 {a}^{2} {b}^{2} + 6ab + 1$

$f) \: {(4xy + \frac{1}{4} )}^{2} \\ \\ 16 {x}^{2} {y}^{2} + 2xy + \frac{1}{16}$