Question

5⋅(7a+5)−7⋅(5a−5)= ​

Answer 1

Ответ:

60

Объяснение:

35a+25-35a+35=60

Answer 2

Ответ:

5(7а+5)-7(5а-5)= 35а+25-35а+35=25+35=60

Answer 3

To solve the expression 5⋅(7a+5)−7⋅(5a−5), we can follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division from left to right, and Addition and Subtraction from left to right). Let's break it down step by step:

Step 1: Simplify the expressions within parentheses: 7a+5 remains the same. 5a−5 can be simplified to 5a - 5.

Now the expression becomes: 5⋅(7a + 5) − 7⋅(5a - 5)

Step 2: Distribute the multiplication across each set of parentheses: 5 * 7a + 5 * 5 − 7 * 5a + 7 * (-5)

Simplifying further: 35a + 25 - 35a - 35

Step 3: Combine like terms: Since we have -35a and 35a, they cancel each other out. Also, 25 - 35 can be simplified to -10.

The final simplified expression is: -10