Respuesta :
When we remove those parentheses, the sign of every term
within the parentheses changes.
within the parentheses changes.
Problem 2. Remove the parentheses.
a) p + (q −r + s) = p + q − r + s
b) p − (q −r + s) = p − q + r − s
In each of the following problems, remove the parentheses, then simplify
by adding the numbers.
For example,
(x − 3) − (y − 4) = x − 3 − y + 4 = x − y + 1.The sign preceding (x − 3) is understood to be + . Therefore the signs within those parentheses do not change.
But the sign preceding (y − 4) is minus. Therefore, y changes to −y, and −4 changes to +4.
Finally, it is the style in algebra to to write the literal terms, x − y, to the left of the numerical term.
