Question

qual a resposta de (x3-3y2).(x3-3y2)?
e (2f-3g)2?​

Answer 1

$( {x}^{3} - 3 {y}^{2} )( {x}^{3} - 3 {y}^{2} ) = ( {x}^{3} - 3 {y}^{2} ) {}^{2} \\ \\ \\ ( {x}^{3} ) {}^{2} + 2( {x}^{3} )( - 3y {}^{2} ) + ( - 3y {}^{2} ) {}^{2} \\ \\ {x}^{6} - 6 {x}^{3} {y}^{2} + 9 {y}^{4}$

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Se dois for expoente:

$(2f - 3g) {}^{2} = (2f) {}^{2} + 2 \times (2f) ( - 3g) + ( - 3g) {}^{2} \\ \\ 4 {f}^{2} - 12fg + 9 {g}^{2}$

Se dois for fator:

$(2f - 3g)2 = 4f - 6g$