(8b-1)(5b-5)

Multiply the 2 binomials using FOIL:

(8b - 1)(5b - 5)

Define FOIL Formula:

First-Outside-Inside-Last:
(a + b)(c + d) = (a * c) + (b * c) + (a * d) + (b * d)

Set our FOIL values:

a = 8b, b = -1, c = 5b, and d = -5

Evaluate:

(8b - 1)(5b - 5) = (8b * 5b) + (-1 * 5b) + (8b * -5) + (-1 * -5)

(8b - 1)(5b - 5) = 40b² - 5b - 40b + 5

40b² - 45b + 5

What is the Answer?

40b² - 45b + 5

How does the Binomial Multiplication (FOIL) Calculator work?

Free Binomial Multiplication (FOIL) Calculator - Multiplies out the product of 2 binomials in the form (a + b)(c + d) with 1 unknown variable.
This utilizes the First-Outside-Inside-Last (F.O.I.L.) method.
This calculator has 2 inputs.

What 2 formulas are used for the Binomial Multiplication (FOIL) Calculator?

FOIL = First, Outside, Inside, Last. Multiply the first terms together, then the outside terms together, then the inside terms together, then the last term together.
(a + b)(c + d) = ab + ad + bc + bd

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