Current location - Training Enrollment Network - Mathematics courses - How is the second solution to the problem (straight line and conic curve) derived from the same reasoning?
How is the second solution to the problem (straight line and conic curve) derived from the same reasoning?
1 also refers to the form of 4x+9y- 13=0, but (2-x 1, 2-y 1) also satisfies.

2. deformation. 4(2-x 1) XIX (2-y1)-13 = 8-4x11018-9y1-13

∫4x 1+9y 1- 13 = 0

∴ 13-4x 1-9y 1=0

∴4(2-x 1)+9(2-y 1)- 13=0