Question

Quais são as raízes?
2x²+6x-63=0

Answer 1

2x^2+6x-63=0

A=2
B=6
C= -63

delta= B^2-4AC
delta=(6)^2-4.(2).(-63)
delta=36+504
delta=540 (não tem raiz exata, +-23 a raiz de delta)

x'= -b+raiz de delta/2a
x'=-6+23/2.2
x'=17/4

x"=-b-raiz de delta/2a
x"=-6-23/2.2
x"=-29/4