Question

y=4x^3+x^2-4x+1 given y ≥ 0 . find the values of x

Answer 1

find the roots

Answer 2

see u get two turning points at 1/2 -2/3

Answer 3

and y>0 as x>1
Y<0 as x<-2

Answer 4

so eqn has to real roots

Answer 5

graph wiill be like this