Question

-8(5b+9)-(3+b)+4(9+5b)

Answer 1

-8(5b+9)-(3+b)+4(9+5b)

-40b-72-(3+b)+4(9+5b)

-40b-72-3-b+4(9+5b)

-40b-72-3-b+36+20b

-21b-72-3+36

Ответ=-21b-39

Answer 2

To simplify the expression -8(5b+9)-(3+b)+4(9+5b), you should follow the order of operations (PEMDAS/BODMAS: Parentheses/Brackets, Exponents/Orders, Multiplication and Division, Addition and Subtraction):

1. First, distribute the -8 and 4 to the terms inside the parentheses:

-8 * 5b = -40b -8 * 9 = -72

4 * 9 = 36 4 * 5b = 20b

So, the expression becomes:

-40b - 72 - (3 + b) + 20b + 36

2. Now, combine like terms. Combine the b terms:

(-40b + 20b) = -20b

3. Combine the constants:

(-72 + 36) = -36

So, the expression simplifies to:

-20b - (3 + b) - 36

4. Distribute the negative sign inside the parentheses:

-20b - 3 - b - 36

5. Combine like terms once again:

(-20b - b) = -21b (-3 - 36) = -39

The final simplified expression is:

-21b - 39