6.tentukan hasil dari perkalian dari
a.5(3×+ 5y - 10 )
b. 2×(3ײ-7× +8 )
a.5(3×+ 5y - 10 )
b. 2×(3ײ-7× +8 )
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Jawab:
a. 5(3x + 5y - 10)
= 15x + 25y - 50
b. 2x(3x² - 7x + 8)
= 6x³ - 14x² + 16x
Penjelasan dengan langkah-langkah:
a. 5(3x + 5y - 10)
= 5.3x + 5.5y - 5.10
= 15x + 25y - 50
b. 2x(3x² - 7x + 8)
= 2x.3x² - 2x.7x + 2x.8
= 6x³ - 14x² + 16x