Question

a) (3x + y)2 b) (3a + 2)2 c) (4a + y3)2​

Answer 1

Resposta:

Explicação passo a passo:

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

$a)$

  $(3x+y)^{2} =(3x)^{2} +2.(3x).(y)+(y)^{2}=9x^{2} +6xy+y^{2}$

$b)$

  $(3a+2)^{2} =(3a)^{2} +2.(3a).(2)+(2)^{2}=9a^{2}+12a+4$

$c)$

  $(4a+y^{3} )^{2} =(4a)^{2} +2.(4a).(y^{3}) +(y^{3}) ^{2}=16a^{2} +8ay^{3}+y^{6}$