In the unary quadratic equation, the matching method is actually to shift the terms of the unary quadratic equation and add the square of half the absolute value of the coefficient of the first term to both sides of the equal sign.

The most basic thing is to add, subtract, multiply or divide a number on both sides of the formula at the same time, and the two sides of the formula remain unchanged. Note: If it is an inequality, you must pay attention to the size of both sides of the inequality. If multiplied by a negative number, the size of both sides of the inequality will change.

The introduction of mathematics is as follows:

Mathematics (Mathematics or maths, from the Greek word "Má thē ma"; Often abbreviated as "mathematics"), it is a discipline that studies concepts such as quantity, structure, change, space and information, and belongs to a formal science from a certain point of view.

Mathematicians and philosophers have a series of views on the exact scope and definition of mathematics. In the development of human history and social life, mathematics also plays an irreplaceable role, and it is also an indispensable basic tool for studying and studying modern science and technology.

The three main mathematical definitions are called logicians, intuitionists and formalists, each of which reflects a different school of philosophical thought. Everyone has serious problems, no one generally accepts it, and no reconciliation seems feasible.

Aristotle defined mathematics as "quantitative science", which lasted until18th century. /kloc-since the 0/9th century, mathematical research has become more and more rigorous, and it has begun to involve abstract topics such as group theory and projection geometry that have no clear relationship with quantity and measurement.

Mathematicians and philosophers began to put forward various new definitions. Some of these definitions emphasize the deductive nature of a lot of mathematics, some emphasize its abstraction, and some emphasize some themes in mathematics. Even among professionals, the definition of mathematics has not been reached.

Mathematics is a thinking tool, everything is the unity of quantity and quality, and mathematics is the science of studying quantity. 1950, hauptmann became interested in crystal structure.

He determined the absolute value of Fourier coefficient, and then deduced the phase from the intensity ... Well, if you don't know what I'm talking about, you only know that he solved a difficult problem that puzzles modern chemists through the classical Fourier analysis theory in mathematics.