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The xintercepts of this ellipse are the values of x when y = 0 The equation is x^2/25 y^2/36 = 1 Make y equal to 0 and your equation becomes x^2/25 = 1 Multiply both sides of this equation by 25 and it becomes x^2 = 25 Take square root of this equation to get x = / 5 You can see from the graph that when y = 0, x = / 5Free equations calculator solve linear, quadratic, polynomial, radical, exponential and logarithmic equations with all the steps Type in any equation to get the solution, steps and graph