Question

monta essa equação 10x"+72x-64=0

Answer 1

10x²+ 72x-64=0

a=10
b=72
c=-64
∆=b²-4ac
∆=72²-4 × 10 × (-64)
∆=5184+2560
∆=7744

x=-72±√7744/2×10
x= -72±88/20
x'= -72-88/20= -160/20= -8
x"=-72+88/20=16/20
(simplificando ambos por 4= 4/5)