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maka
1. a) f(x) =x² +2x +3
➡a= 1, b= 2, c= 3
1. b) f(x) = x²-x +10
➡ a= 1, b= -1, c= 10
1. c) 2x² +x
➡ a= 2, b=1, c=0
1. d) 7- 2x -x²
➡ a= -1, b=-2, c=7
1. e) 15-3x²
➡ a= -3, b= 15