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693, and the λ is the decay constant. So the coefficient of x will be 6 in (x + 3)2. Question 16 Categorisation: Use the quadratic formula in the context of Pythagoras’ Theorem. Solve quadratic equations using the quadratic formula. Divide the entire equation by the coefficient of x 2, apply the series of steps to complete the squares, and solve. Solving Equations Graphically Gcse Maths Mr Mathematics You. If the question was solve x^2=a^2 x2 = a2 we would simple take the square root of both sides so that x=\pm a x = ±a. Step 3: Use these factors and rewrite the equation in the factored form. Step 1: Using the laws of inequality , simplify the inequality on both sides, LHS and RHS. 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