what is the sum of 9r² - 6r + 4 and 4r² + 8r - 9
Answers
Answered by
1
Answer:
13r²+2r-5
Step-by-step explanation:
9r²-6r+4
+ 4r²+8r-9
___________
13r²+2r-5
Answered by
0
Answer:
13r^2+2r-5
Step-by-step explanation:
add the coffecient of r^2 together which becomes 13 r^2
add the coffecient of r together which gives +2r
add the constants = -5
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