# Please, multiply these polynomials: (3t – 7)(1 + 3t^2)

Please, multiply these polynomials: $$(3t – 7)(1 + 3t^2)$$

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$$(3t – 7)(1 + 3t^2) = 3t \times1 + 3t \times 3t^2 + (-7) \times 1 + (-7) \times 3t^2$$

$$= 3t + 9t^3 – 7 – 21t^2$$

$$= 9t^3 – 21t^2 + 3t - 7$$