Question

The expression 4x - 5x^2 +1 is positive then x lies in ?
Please help!!!

Answer 1

Answer:

Step-by-step explanation:

4x-5x^2+1 is positive

Therefore 5x^2-4x-1 is negative

5x^2-5x+x-1

5x(x-1)+1(x-1)

(5x+1)(x-1) =0 is negative

X=1, -1/5

X is not equal to 1 becoz it is positive

Therefore X=-1/5