a) (x-2) (x+1) = 2(x-3)
b) ( x-1 )^2 – 2(x+3) – 2=0
bantuannya ya teman teman 😀
Nyatakan persamaan berikut dalam bentuk umum persamaan kuadrat dan tentukan nilai a,b,c,
Jawaban Terkonfirmasi
A) (x – 2)(x + 1) = 2(x – 3)
x² – 2x + x – 2 = 2x – 6
x² – x – 2 = 2x – 6
x² – x – 2x – 2 + 6 = 0
x² – 3x + 4 = 0
(x – 4)(x + 1) = 0
x = 4 atau x = -1
b) (x – 1)² – 2(x + 3) – 2 = 0
x² – 2x + 1 – 2x – 6 – 2 = 0
x² – 4x – 7 = 0
x² – 4x + 4 – 11 = 0
x² – 4x + 4 = 11
(x – 2)² = 11
x – 2 = 11
x = 11 + 2 = 13
atau
x – 2 = -11
x = 2 – 11 = (-9)