How do you find the product of (3a-b)(2a-b)?

3 Answers

Multiply each term in the parenthesis by each term in the other parenthesis, or better known as the FOIL method.

Explanation:

(3a-b) (2a-b)

= (3a)(2a)+ (3a)(-b)+(-b)(2a)+(-b)(-b)

= 6a^2 + b^2 - 5ab

May 2, 2018

Formally, (a + b) * (c + d) = ac + ad + bc + bd.
When there are negative signs or subtraction involved, it may be helpful to re-write the equation in standard form.

Explanation:

(3a - b)(2a - b) =
(3a + -b)(2a + -b)=
(3a * 2a) + (3a * -b) + (-b * 2a) + (-b * -b) =
6a^2 + (-3ab) + (-2ab) + (b^2)=
6a^2 -5ab + b^2

May 2, 2018

Please read below:

Explanation:

Consider making a table to list all the available terms in the binomials.

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When you're multiplying binomials, you're multiplying each term of one binomial, with one of the other.

3a times -b; 3a times 2a
-b times 2a; -b times -b

This should get you 6a^2-5ab+b^2 as your product.