Q. - Universityku

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1.) Selesaikan soal perkalian bentuk aljabar berikut:

a. (6x + 7y) (9x² + 3y) = ….
b. (4x – 7) (7x² + 4) = …

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Q.

$underlinemathrm{✎ :Diketahui}$

$\$

$underlinemathrm{✎ :Ditanya}$

$\$

$underlinemathrm{✎ :Jawab}$

$= sf(6x.9 {x}^{2} ) : (6x.3y) : (7y.9 {x}^{2} ) : (7y.3y)$

$= underline{ sf54x ^{3} + 18xy + 63yx ^{2} + 21y ^{2} }$

$- - - - - - - - - -$

$= sf(4x.7 {x}^{2} ) : (4x.4) : ( - 7.7 {x}^{2} ) : ( - 7.4)$

$= underline{ sf28 {x}^{3} + 16x - 49 {x}^{2} - 28 }$

a.) ( 6x + 7y ) ( 9x² + 3y )

= ( 6x . 9x² ) ( 6x . 3y ) ( 7y . 9x² ) ( 7y . 3y )

b.) ( 4x – 7 ) ( 7x² + 4 )

= ( 4x . 7x² ) ( 4x . 4 ) ( – 7 . 7x² ) ( – 7 . 4 )