pair of linear equation in two variable

Pair of linear equation in two variable

Class-10 math (ncert and cbse)

7/29/2020www.bhushantech.in

BHUSHAN TECH

INTRODUCTION

x के जिस मान के लिए ax +b  का मान zero आ जाता है उसे equation ax +b =0  का हल (solution )कहा जाता है। 

example :-x =3  के लिए x -3 का मान है  0  

linear equation

1. The degree of linear equation is one.
2. the graph of linear equation straight line.
3. it has contain two variable with standard form ax+by+c=0.

axioms of equality-

solution of equation on the basis of low of equality:-

1. ifa=b then a+c=b+c
2. if a=b then a-c=a-c
3. if a=b then ac=bc
4. if a=b then a\c=a\c but c is not equal to zero

note-if a\b=c\d then ad=bc

               Exercise-3.1

1.

2. The coach of a cricket team buys 3 bats and 6 balls for ` 3900. Later, she buys another bat and 3 more balls of the same kind for ` 1300. Represent this situation algebraically and geometrically.

 3.

 

Solution pair of linear equation in two variable:-

we know that solution of linear equation equation ax+by+c=0 in variable X,Y is

( this satandard form of equation is called pair of linear equation in two variable and where all coefficient of linear equation is all are real number and for condition a squareplus b square is not equal to zero because if a square plus b square is equal zero then the coefficient of pair of linear equation is not real and also is not defined as wellaa undefined.if any under root is negative then
the this value is unreal

Exercise-3.2-

Concept of consistant and inconsistant