The operation of (1) seeking the same factor product is called power. The result of power operation is called power.

Generally speaking, it is read as: n power of a, which means that n A are multiplied; Where a is the base and n is the exponent, which is called power.

(2) Any degree of a positive number is a positive number.

The odd power of a negative number is a negative number,

Even the power of negative numbers is positive.

(3) The square of a number is itself, and this number is 0 and1;

The cube itself is a number of 0, 1 and-1.

Summary of knowledge points of unary quadratic equation

1. An unary quadratic equation: An equation with algebraic expressions on both sides and only one unknown (unary) and one unknown with degree 2 (quadratic) is called an unary quadratic equation.

2. The quadratic equation with one variable has four characteristics:

(1) contains an unknown number;

(2) and the unknown number is 2;

(3) is an integral equation. To judge whether an equation is an unary quadratic equation, first look at whether it is an integral equation, and then sort it out. If it can be arranged in the form of ax2+bx+c=0(a≠0), then this equation is a quadratic equation.

(4) Turn the equation into a general form: when ax2+bx+c=0, it should satisfy (a≠0).

3. General form of quadratic equation with one variable: Generally speaking, any quadratic equation with one variable about X can be transformed into the following form ax2+bx+c=0(a≠0) after sorting.

The order of the unary quadratic equation is ax2+bx+c=0(a≠0), where ax2 is the quadratic term and A is the coefficient of the quadratic term; Bx is a linear term, and b is a linear term coefficient; C is a constant term.