X²+5x-15= 0 Berapakah hsil jumlah dri persmaan kuadrat

X²+5x-15= 0
a = 1
b = 5
c = -15

x1 + x2 = -b/a
= -5/1
= -5

Hasil jumlah =
x1 + x2 =
-b/a
-5/1 = -5