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Multiplying (6b4)(9b5)(-6b^4)(-9b^5)

Multiply the two single-variable monomials (6b4)(9b5)(-6b^4)(-9b^5).

Step 1 — Rearrange using the Commutative Property. Separate the numerical coefficients from the variable parts:

6(9)b4b5-6 \cdot (-9) \cdot b^4 \cdot b^5

Step 2 — Multiply coefficients and apply the Product Property. Multiplying the two negative coefficients gives a positive 5454. Adding the exponents of the shared base bb gives b4+5=b9b^{4+5} = b^9.

The final product is 54b954b^9.

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Updated 2026-04-29

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Ch.5 Polynomials and Polynomial Functions - Intermediate Algebra @ OpenStax

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