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zaharov [31]
3 years ago
7

What is the product? (6r-1)(- Br-3)

Mathematics
1 answer:
Andru [333]3 years ago
4 0

Answer:

-6Br^2-18r+Br+3

Step-by-step explanation:

we have the expression:

(6r-1)(- Br-3)

We need to multiply the two terms in the first parenthesis by the two terms in the second parenthesis:

(6r)(-Br)+(6r)(-3)+(-1)(-Br)+(-1)(-3)

we solve each term taking into account the law of signs

(-)(-)=+

and

(+)(-)=-

also for the first term we use that r*r=r^2

thus we have:

-6Br^2-18r+Br+3

it can be simplified a little more if we factor an r of the second and third term:

-6Br^2+r(-18+B)+3

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