Question

The given quadratic equation 4x2 – 5x –
1 = 0 has​

Answer 1

the question would be right when there is '+' sign onward 1 .

this can also solve but answer is in root .

Answer 2

Given:

Consider the given quadratic equation $4x^{2} -5x-1=0$

Find:

Need to find roots

Solution:

We will solve the given quadratic equation by discriminant rule

Comparing the given equation with standard equation $ax^{2} +bx+c=0$

a = 4, b = -5 and c= -1

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Substitute the values we have

$x=\frac{+5\pm \sqrt{(-5)^2-4(4)(-1)}}{2(4)}$

$x=\frac{5\pm \sqrt41}{8}$

This is the required solution.