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What are the points of intersection of x2 plus y2 plus 4x plus 6y -40 equals 0 with x -y equals 10 showing key stages of work?
Wiki User
∙ 9y ago
If: x^2+y^2+4x+6y -40 = 0 and x -y = 10
Then by rearranging: x = 10+y and 2y^2+30y+100 = 0
Solving the above quadratic equation: y = -10 and y = -5
Points of intersection by substitution are: (0, -10) and (5, -5)
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∙ 9y ago
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