Question 618937
Hello, 
(-5x2 + 2x – 5) – (7x2 – 2x – 3) 
Distribute the -1
-5x2 + 2x – 5 – 7x2 + 2x + 3
combine like terms
-12x^2+4x-2
There you go. 
Make sense?
RJ
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