If a multivariate higher-order equation gives four answers, but there is no solution process, we can first use the estimation method to estimate the solution of the equation and substitute it into the original equation for verification. Apply the properties of equations to solve equations, and use equal terms to transform the equation into a monomial. Then move the terms, move the terms containing unknown numbers to the left, and move the constant terms to the right, 8+X=25, solution: X=25-8, answer: X=17. Use the rule of bracket removal to remove brackets from equations to remove complexity and refine equations. The formula method has resulted in many solvable multivariate and higher-order equations having formulas, and the handling of cases has become traceable. However, just because there are traces to follow, does not mean that it is a real solution. What you see with your own eyes may not be the truth, and the truth needs to be verified. Use the solution of the equation to solve the geometric meaning of the intersection point of two or more correlation function images. This is the solution if the equation still holds while solving the equation.
(This story is purely fictitious, any similarity is purely coincidental)
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