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How to solve this Math problem? Though there is solution, I`m unable to understand the procedure.

How to solve this Math problem? Though there is solution, I`m unable to understand the procedure.

Question Image
Grade:12

1 Answers

Deepak Kumar Shringi
askIITians Faculty 4405 Points
3 years ago
To find combined equation of pair of line joining intersecting point of a curve and a straight line we substitute 1 in equation of curve we find this 1 from given straight line such in this question 1=2x+y and we multiply in equation of curve constant term by 12as here by (2x+y)2and terms of x and y by 1 and you can get the equation of combined pair of line.
now two lines are at right angles that means coff of x2+y2=0

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