Find each of the following products: (9x2 – x + 15) × (x2 – 3)

1.	Find each of the following products: (9x2 – x + 15) × (x2 – 3)
Answer» By using horizontal method, We have; = (9x² – x + 15) × (x² – 3) = x²(9x² – x +15) – 3(9x² – x + 15) = 9x⁴ – x³ + 15x² – 27x² + 3x – 45 = 9x⁴ - x³ – 12x² + 3x – 45

Answer»

By using horizontal method,

We have;

= (9x² – x + 15) × (x² – 3)

= x²(9x² – x +15) – 3(9x² – x + 15)

= 9x⁴ – x³ + 15x² – 27x² + 3x – 45

= 9x⁴ - x³ – 12x² + 3x – 45

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