Question

Hasil x2+2x-48=0 dengan cara melengkapkan kuadrat sempurna

Answer 1

X^2 + 2x - 48 = 0
x^2 + 2x + .... = 48 + ....
Titik-titiknya Kita isi dengan (b/2)^2 = (2/2)^2 = 1
x^2 + 2x + 1 = 48 + 1
(x + 1)^2 = 49
x + 1 = ± 7
x = ± 7 - 1
x = 7 - 1 = 6 atau x = -7 - 1 = -8