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What number should be added to both sides of the equation to complete this square? x^2-10x=7

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2