Question

formula de bhaskara 2x = 15 - x²

Answer 1

2x=15-x²

x²+2x-15=0

a=1 b=2 c=-15

∆=b²-4.a.c

∆=(2)²-4.1.(-15)

∆=4+60

∆=64

x=-b±√∆

2.a

x=-2±√64

2.1

x=-2±8

2

x'=2+8= 10= 5

2 2

x"=2-8= -6= -3

2 2