Negative numbers in parentheses Merge similar items and evaluate them! For example: - b-7ab. Suppose B is 2 and a is 3, what is the format? - B need to add brackets?

Negative numbers in parentheses Merge similar items and evaluate them! For example: - b-7ab. Suppose B is 2 and a is 3, what is the format? - B need to add brackets?

=-B (1 + 7a) - B is not preceded by brackets

When removing brackets, what if there is a coefficient in front of the brackets? The coefficient is negative

When the bracket is removed, the coefficient is multiplied by each number in the bracket. When the coefficient is negative, the coefficient is added, changed and subtracted

How to write a negative number in brackets
Which is (3 + (- 5)) or [3 + (- 5)]

Second, big brother

Must brackets be added when negative numbers are calculated in addition of rational numbers
Specific point, key point, easy to understand