Question 1149179
.


Solving quadratic equations is a &nbsp;<U>BASIC &nbsp;ELEMENTARY &nbsp;SKILL</U> &nbsp;<U>each student &nbsp;MUST &nbsp;DEVELOPE</U>&nbsp; in his &nbsp;(or her)&nbsp; school years.


To help the students, &nbsp;the lessons were created in this site

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/Introduction-Into-Quadratics.lesson>Introduction into Quadratic Equations</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/proof-of-quadratic-by-completing-the-square.lesson>PROOF of quadratic formula by completing the square</A>

giving the general theory and examples.


Read them and learn on how to solve quadratic equations using the quadratic formula on your own, &nbsp;once and for all.


Also, &nbsp;you have this free of charge online textbook in ALGEBRA-I in this site

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-I - YOUR ONLINE TEXTBOOK</A>.


The referred lessons are the part of this textbook under the topic "<U>Quadratic equations</U>". 



Save the link to this online textbook together with its description


Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson


to your archive and use it when it is needed.



/\/\/\/\/\/\/\/


Hey, in arithmetic, the first basic skill is to know that 2 x 2 = 4.

The second basic skill is to know the multiplication table.



In Algebra, the first basic skill is to know how to solve the simplest lihear equation ax + b = c.

The second basic skill is to know on how to solve a quadratic equation.



Therefore, when you come with questions, similar to that of your post, it is almost as if you come to ask "how many is 2 x 2".