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## Answers

=(2×5)(x^3) + (3×5)x^2 + (6×5)x + (2×3)x^2 + (3×3)x +(3×-6)

= 10x^3 + 15x^2 - 30x + 6x^2 + 9x - 18

= 10x^3 + (15 +6 )x^2 + (9-30)x -18

=10x^3 + 21x^2 - 21x - 18//

= 2x²(5+3x) + 3x(5+3x)-6(5+3x)

= 10x² + 6x³ + 15x + 9x² - 30 -18x

= 6x³ + 19x² - 3x - 30