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Answer:
Standard form: 2x²-5x+12=0
a=2 b=-5 c=12
Step-by-step explanation:
2(x+3)²-5x=6
2(x²+9)-5x-6=0
2x²+18-5x-6=0
2x²-5x+18-6=0
2x²-5x+12=0
a=2 b=-5 c=12