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Simple EquationsThe line x+3y=1 intersects the curve x^2 - xy + y^2 = 21 at the points A and B. Both the line and the curve have the same coordinates at the points A and B. x + 3y = 1 => x = 1 - 3y Substitute...
Simple Equationsfor this one you can solve this in many ways. (x+2)^3 = (x+2)(x+2)(x+2) --> foil out the the first two factors = (x^2 + 4x + 4) (x+2) then distribute the thir factor...