The equivalent expression of -(-5q-3.1r+4.5) without parenthesis is 5q + 3.1r - 4.5
In order to get the equivalent expression without parenthesis, we will use the distributive law. Also, we must know that:
- - × - =+
- + × - = -
- + × + =+
Given the expression -(-5q-3.1r+4.5)
This can also be written as -1 (-5q-3.1r+4.5)
On expansion
-1 (-5q-3.1r+4.5)
= -1(-5q) -1(-3.1t) -1(+4.5)
Using the sign rule, the result becomes:
= 5q + 3.1r - 4.5
Hence the equivalent expression without parenthesis is 5q + 3.1r - 4.5
Learn more here: brainly.com/question/2118428
