Question

The vertex of the parabola f(x)=-5x^2+4x+1

Answer 1

(-0.4,0.2) is the vertex

Step-by-step explanation:

you can use -b/2a

You can also use app name desmos just type the equation

You can also use calculator in 991-es edition mode 5,3 or on 991-arx menu 9,2,2