Question

Tolong dibantu akar persamaan dari : 2Xkuadrat - 8X + 1 = 0
trimakasih :)

Answer 1

X1,2 = -b plus minus (seperti tanda kurang lebih) akar b*2 - 4ac
       = -8 plus minus akar -8*2 - 4.2.1
       = -8 plus minus akar 64 - 8
       = -8 plus minus akar 56
x1 = -8 + akar 56
x2 = -8 - akar 56

Answer 2

2xkuadrat - 8x = -1
2xkuadrat - 8x + 16 = -1 + 16
(x+4)kuadrat = plusminus akar 15
x+4 = plusminus akar 15
x = -4 plusminus akar 15
x1 = -4 + akar 15
x2= -4 - akar 15