Question and answer
Given: X = r 2, Y = 2r - 9, and Z = r2 17r 30. Simplify [X Y - Z] X.
(r+2)(2r-9)-(r^(2)+17r+30)/(r+2)... For a polynomial of the form x^(2)+bx+c, find two factors of c (30) that add up to b (17). [ [ In this problem 15*2=30 and 15+2=17, so insert 15 as the right hand term of one factor and 2 as the right-hand term of the other factor. (r+2)(2r-9)-((r+15)(r+2))/(r+2)... Reduce the expression by canceling out the common factor of (r+2) from the numerator and
denominator. (r+2)(2r-9)-((r+15) (r+2) )/( (r+2) )... Reduce the expression by canceling out the common factor of (r+2) from the numerator and denominator. (r+2)(2r-9)-(r+15) Multiply each term in the first group by each term in the second group using the FOIL method. FOIL stands for First Outer Inner Last, and is a method of multiplying two binomials. First, multiply the first two terms in each binomial group. Next, multiply the outer terms in each group, followed by the inner terms. Finally, multiply the last two terms in each group. (r*2r+r*-9+2*2r+2*-9)-(r+15)... Simplify the FOIL expression by multiplying and combining all like terms. (2r^(2)-5r-18)-(r+15)... Multiply -1 by each term inside the parentheses. (2r^(2)-5r-18)+-r-15... Since -5r and -r are like terms, subtract r from -5r to get -6r. 2r^(2)-6r-18-15... Subtract 15 from -18 to get -33. 2r^(2)-6r-33 is the answer. ] ]
Expert answered|tantimanle|Points 14|
Question
Asked 10/9/2013 7:34:11 AM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
23,845,500 questions answered
Weegy Stuff
S
Points 173 [Total 570] Ratings 0 Comments 173 Invitations 0 Offline
S
P
P
Points 142 [Total 949] Ratings 0 Comments 142 Invitations 0 Offline
S
1
L
L
P
R
P
L
P
Points 106 [Total 11279] Ratings 0 Comments 106 Invitations 0 Offline
S
L
P
Points 46 [Total 2114] Ratings 0 Comments 46 Invitations 0 Offline
S
Points 7 [Total 17] Ratings 0 Comments 7 Invitations 0 Offline
S
Points 4 [Total 904] Ratings 0 Comments 4 Invitations 0 Offline
S
Points 4 [Total 4] Ratings 0 Comments 4 Invitations 0 Offline
S
R
Points 2 [Total 438] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 2 [Total 2] Ratings 0 Comments 2 Invitations 0 Offline
S
Points 1 [Total 2] Ratings 0 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)