Covid19 has spread globally. When the Covid-19 pandemic occurs, schools must be closed or partially opened, which affects teaching and learning. Educational innovations to deal with epidemics such as Covid-19 and other urgent epidemics are very important. Therefore, the three cores of Education 4.0 knowledge applicable to pandemics such as COVID-19 are simple, self-learning and technology-integrated knowledge (SST knowledge).

Simple knowledge is the most important core of Education 4.0 , it same as Albert Einstein quotes: everything should be made as simple as possible, but not simpler, If you can't explain it simply you don't understand it well enough, We cannot solve our problems with the same thinking we used when we created them.

Peter Chew Method for Quadratic Equation is a simple method to solve the same problem, compare current methods. The Objective of Peter Chew Method is to make it easier for upcoming generation to solve the quadratic equation problem and solve the higher order function problem of the quadratic equation that cannot be solved by the current method.

The French mathematician Veda established the relationship between the equation root and the coefficient in 1615. Veda's theorem states that if α and β are two roots of the quadratic equation ax2+bx+c=0 and a ≠ 0. Then the sum of the two roots, α+β = - ba , the product of the two roots, αβ = ca .

The current method for solving the problem of the quadratic equation is to first find the values of α+β and αβ using the Veda's theorem, then convert it into the α+β and αβ forms, and then substitute the values of α+β and αβ to find the answer.

The current method is not suitable for solving the problem of higher order functions such as a4896+ b 4896, because it is difficult to convert a4896+ b 4896 into α+β and αβ forms.

By using Peter Chew Method , The problem of the quadratic equation does not need to be converted to α+β and αβ, so the problem of higher order functions such as a4896+ b 4896 can also be solved.

Peter Chew method is to first find the roots of the quadratic equation, then let it as α and β, and then substitute the values of α and β to the problem to find the answer. Peter Chew method is also applicable to a quadratic equation with complex roots and a quadratic equation with complex coefficients.

Similarly, since the current solution is not suitable for solving the higher-order function problem of quadratic equations, it is not suitable for finding new quadratic equations with higher-order functions, but Peter Chew method can solve the problem of higher-order function quadratic equations. Therefore, Peter Chew method can also be used to find new quadratic equations containing higher order functions.

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