Solve graphically for x and y , 3x+y+3=0 and x-2y =6
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EXPLANATION.
Show graphically x and y ,
(a) = 3x + y + 3 = 0.
(b) = x - 2y = 6.
From equation (a) we get,
(a) = 3x + y + 3 = 0.
put the value of x = 0. we get,
⇒ 3(0) + y + 3 = 0.
⇒ y = -3.
Their co-ordinates are = ( 0,-3 )
put the value of y = 0 we get,
⇒ 3x + 0 + 3 = 0.
⇒ x = -1.
Their co-ordinates are = ( -1 , 0 ).
From equation ( b ) we get,
(b) = x - 2y = 6.
put the value of x = 0 in equation.
⇒ 0 - 2y = 6.
⇒ y = -3.
Their co-ordinates are = ( 0,-3).
put the value of y = 0 in equation,
⇒ x - 2(0) = 6.
⇒ x = 6.
Their co-ordinates are = ( 0,6).
Both curve intersect at same point = (0,-3)
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