Question

Presiso presiso pra amanhã

Answer 1

Resposta:

Explicação passo a passo:

$(a+b)^{2} =a^{2} +2ab+b^{2}$

$(a-b)^{2} =a^{2} -2ab+b^{2}$

$(a+b).(a-b)=a^{2} -b^{2}$

$a)$

 $(\sqrt{3}+\sqrt{2}) ^{2} =3+2\sqrt{6}+2=5+2\sqrt{6}$

$b)$

  $(1-\sqrt{7}) ^{2} =1-2\sqrt{7}+7=8-2\sqrt{7}$

$c)$

  $(4\sqrt{2}+5).( 4\sqrt{2}-5)=(4\sqrt{2} )^{2} -(5)^{2} =32-25=7$

$d)$

   $(2+\sqrt{10}) ^{2} =4+4\sqrt{10}+10=14+4\sqrt{10}$

$e)$

   $(\sqrt{11}+\sqrt{7}).( \sqrt{11}-\sqrt{7} )=(\sqrt{11}) ^{2} -(\sqrt{7}) ^{2} =11-7=4$

$f)$

   $(3\sqrt{3}+\sqrt{2}) ^{2} =27+6\sqrt{6}+2=29+6\sqrt{6}$