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Need help with an Algebra problem! How do you solve 12x^2 -5x=2 by using the quadratic formula? What value of n makes √10-3n = 7 true? Find the sum to n terms of the series, 2+4(1/5)+6(1/5)²...,and deduce the sum to infinity.? Zn+ AgCl yields ZnCl2+ Ag balance? Find the directional derivative of f(x,y) = x/y at the point (2, -4)?