1) x2+ 2x+ 9+2x2=9+2x2 + 9 + 2x a) x1=-3,x2=3 b) 1 c) 2 d) e e) 5 f) 8 2) what is the percentage of biological hotspots in the world a) less then 20% b) 100% c) Penny percent d) 1cent

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