Tentukan himpunan penyelesaian persamaan y=x²-2x-2 y=-x²+2x+4​

Persamaan dua variabel

y1 – y2 = 0

–

y1 = x² – 2x – 2 dan y2 =  -x² + 2x + 4

y1 – y2 = 0

​x² – 2x – 2 – (  -x² + 2x + 4 ) = 0

x² – 2x – 2 + x² – 2x –  4 =0

2x² – 4x  - 6 = 0

2(x² – 2x – 3 ) =0

2(x – 3)(x + 1) = 0

x – 3 = 0  atau x + 1 = 0

x = 3  atau x = – 1

HP = { -1,  3 }