Bantu dong kak Tentukan persamaan kuadrat yg akar² nya √7-2 dan √7+2 please kk
Jawab:
x1 = √7-2 dan x2= √7+2
x1 + x2= √7 – 2 + √7 + 2
x1 + x2= 2√7
x1. x2 = (√7 – 2 )(√7 + 2 )
x1. x2 = 7 – 4 = 3
PK x² -(x1+x2)x + (x1.x2) =0
x² – 2√7 x + 3 = 0
Bantu dong kak Tentukan persamaan kuadrat yg akar² nya √7-2 dan √7+2 please kk
Jawab:
x1 = √7-2 dan x2= √7+2
x1 + x2= √7 – 2 + √7 + 2
x1 + x2= 2√7
x1. x2 = (√7 – 2 )(√7 + 2 )
x1. x2 = 7 – 4 = 3
PK x² -(x1+x2)x + (x1.x2) =0
x² – 2√7 x + 3 = 0