Please enable JavaScript.
Coggle requires JavaScript to display documents.
Unit 3 Quadratic Equations - Coggle Diagram
Unit 3 Quadratic Equations
Concept quadratic equations in one variable
只含有一个未知数，且未知数的最高次数是2的整式方程
standard form：ax的平方+bx+c=0
满足这个方程的实数x叫做这个方程的实数根（或实数解）
Solving quadratic equations
factoring
finding the square roots
completing the square
quadratic formula
The discriminant of a quadric equation
1 write the equation in standard form
2 Identify the value of abc
delta：b的平方-4ac
3 evaluate the discriminant
4 write a conclusion
Vieta's Formula
x1+x2=-b/a
x1✖️x2=c/a
Factoring by quadratic formula
a（x-x1）（x-x2）