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Multiplying (5y7)(7y4)(5y^7)(-7y^4)

Multiply the two single-variable monomials (5y7)(7y4)(5y^7)(-7y^4).

Step 1 — Rearrange using the Commutative Property. Group the numerical coefficients together and the variable terms together:

5(7)y7y45 \cdot (-7) \cdot y^7 \cdot y^4

Step 2 — Multiply coefficients and apply the Product Property. The product of the coefficients is 5(7)=355 \cdot (-7) = -35. Adding the exponents of the shared base yy gives y7+4=y11y^{7+4} = y^{11}.

The final product is 35y11-35y^{11}.

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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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