Instead of solving each set of non-linear system of equations 6 times, I will try a simpler way, which is more adapted to multiple choice questions. However, please be warned that this method will not improve immensely math skills, but will help with reasoning, and possibly a broader understand in system of equations.
For simplicity, I will denote the sets of system of non-linear equations by S={A,B,C,D,E,F} from left to right.
1. given solutions {(-2,3),(7,-6)} We first check each member of S, i.e. A,B,C,D,E,F for the linear conditions. A: x+y=-2+3=1 ≠ 3 so no B: x-y=-2-3=-5 ≠ 1 so no C: 2x+y=-2(2)+3=-1 ≠ 1 so no D: x+2y=-2+3(2)=4 ≠ 2 so no E: -x+y=2+3=5 ≠ 1 so no F: x+y=-2+3=1 ≠ 3 so YES now check the other solution 7-6=-1 OK
Now check the non-linear condition for F: S1: (-2,3) y-15=3-15=-12 -x^2+4x=-(-2)^2+4*(-2)=-12 good S2:(7,-6) y-15=-6-15=-21 -x^2+4x=-(7^2)+4(7)=-49+28=-21 also good, So Solution set (1) matches tile F
(2) Given solutions {(-5,8),(3,0)} We proceed in a similar way, to find that -5+8=3 & 3+0=3 (matches A) and nothing else. Check non-linear conditions (optionally, I transposed the terms to make comparison easier) A. x^2+x-y=(-5)^2+(-5)-8=25-5-8=12 (looks good) x^2+x-y=(3)^2+(3)-0=9+3=12 (looks even better) So we determined that {(-5,8),(3,0)} is the solution for tile A.
(3) For solution set {(-2,5),(3,-5)} Check linear conditions: x+y=3 and -3, so does not satisfy A,& F. x-y=-7 and 8, so does not satisfy B 2x+y=5 and 1 so satisfies C x+2y=8 & -7 so does not satisfy D -x+y=7 & -8 so does not satisfy E Thus C is our only set. NOTE: if two distinct points satisfy one linear condition (say C), then both points cannot satisfy another non-equivalent linear condition, i.e. we didn't really have to check points D & E (which are not equivalent linear conditions as C) once we have found C. Now check non-linear conditions: x^2-3x-y=(-2)^2-3(-2)-5=5 ok x^2-3x-y=(3)^2-3(3)-(-5)=5 ok So solution set (3) matches tile C.
@officiallyqueenz, for your benefit, I will leave one for you as exercise. Please proceed to find the system for solution set (4). Post a your work as comments if you get stuck, or your answer for verification if you wish.
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To bisect an angle using paper folding, fold the paper through the angle so that the line segments determining the angle lie ON EACH OTHER.
To bisect means to divide into two equal parts and to find the middle line of the shape or angle. Simply fold the paper using the written lines of an angle. Each line must lie on each other, flatten the paper and the crease formed will be the bisecting line.
