Question

calcular as raizes das funções abaixo: A) g(x)=x2-1x-132 B) g(x)=5x2+2x-16

Answer 1

Use baskara:

Δ=b²-4ac

x1=(-b+√Δ)/2a
x2=(-b-√Δ)/2a

a) y=x²-x-132

Δ=1-4.1.(132)=529 ∴ √Δ=23

x1=(-(-1)+23)/2.1=24/2=12

x2=(1-23)/2=22/2=11

b) y=5x²+2x-16

Δ=4-4.5.(-16)=324 ∴ √Δ=18

x1=(-2+18)/2.5=16/10=8/5
x2=(-2-18)/2.5=-20/10=-2

Espero ter entendido