hasil perkalian (3× + 2y)(9×^2 - 6×y + 4y^2) adalah. . .
Matematika
Willasyafiraa
Pertanyaan
hasil perkalian (3× + 2y)(9×^2 - 6×y + 4y^2) adalah. . .
1 Jawaban
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1. Jawaban Lianty164
( 3x +2y ) ( 9x^2 -6xy + 4y^2)
= 3x ( 9x^2 -6xy + 4y^2) + 2y ( 9x^2 -6xy + 4y^2)
= 27x^3 - 18x^2y + 12xy^2 + 18x^2y - 12xy^2 + 8y^3
= 27x^3 - 18x^2y + 18x^2y + 12xy^2 - 12xy^2 + 8y^3
= 27x^3 + 8y^3