Question

Dado f(x)=-2x^2+120x, calcule f(x)=1600​

Answer 1

Resposta:

X¹=160 X²=80

Explicação passo-a-passo:

1600=-2x²+120x                

2x²-120x+1600=0

X¹=-b+Vb²-4ac

X¹=120+V14400-4.2.1600

X¹=120+V14400-12800

X¹=120+V1600

X¹=120+40

X¹=160

X²=120-40

X²=80