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CBSE Class 9 Answered

sir you told that x and y cannot be zero but in some sums you havw put the value as zero so can you explain how it happens 
Asked by Namita.kmr | 20 Jul, 2020, 22:39: PM
answered-by-expert Expert Answer
in an linear equation
ax+by+c=0
 
if we put x = 0 and y =0 together
then
c=0
 
consider
 
2x+3y+4=0
 if we put x=0, y=0
then
4=0....which is wrong 
 
so x=0 y=0, means c should be equal to 0
so the equation looks like ax+by =0
 
but we can put x=0, alone in any linear equation
and y=0, alone in any linear equation
not together in all equations.
Answered by Arun | 21 Jul, 2020, 11:20: AM

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