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Whats the x and y of a quadratic function like this, X^2-5x, how do you solve for it? Domain and range? Is a gravity field basically a force potential? Prove that tanA=cosec2A-cot2A.Deduce the of value tan(45/2)? Zeros -4,0,5 degree:3 polynomial with integer coefficients of 1? Is there a practical limit to the size of ships?