No.105 Removing Parentheses
POINT
When a plus sign is before parentheses, keep the signs. When a minus sign is before parentheses, change every sign inside.
Simplify the following expressions.
Example
\((3a+2b)+(2a+5b)\)
\((5x+2y)-(2x-3y)\)
① \(5a+7b\)
② \(3x+5y\)
② \(3x+5y\)
Try it yourself.
Simplify the following expressions.
PRACTICE 01
\((4a-b)+(3a+2b)\)
\(7a+b\)
PRACTICE 02
\((6x-y)-(x+4y)\)
\(5x-5y\)
PRACTICE 03
\((2x+5y)+(4x-y)\)
\(6x+4y\)
PRACTICE 04
\((7a-3b)-(2a+b)\)
\(5a-4b\)
PRACTICE 05
\((-3m+2n)+(5m-4n)\)
\(2m-2n\)
PRACTICE 06
\((6p+q)-(-2p+3q)\)
\(8p-2q\)