Which constant should be added or subtracted to solve the quadratic equation 4x^2 - 3x -5 by method of completing - Maths - Quadratic Equations

Question

Which constant should be added or subtracted to solve the
quadratic equation 4x^2 - 3x -5 by method of completing the
square?
Answer by expert shows( root 3/8)2 But how? I dint
understand? Please explain Tomorrow's exam!:

Q Given, quadratic equation is :

- 4 x 2 - 3 x - 5   = 0

Varun Rawat · Accepted Answer

The given quadratic equation is,4x2 - 3x - 5 = 0At first we will make the coefficient of x2 as unity
Dividing the above equation by 4, we getx2 - 34x - 54 = 0Now, perfect square can be completed by adding 12 coefficient of x2 on both sides of the equation
Now, coefficient of x = -34⇒12 coefficient of x = -38⇒12 coefficient of x2 = -382 = 382So, the required constant that must be added and subtracted from the above equation is 382

Which constant should be added or subtracted to solve the quadratic equation 4x^2 - 3x -5 by method of completing the square? Answer by expert shows( root 3/8)2. But how? I dint understand? Please explain. Tomorrow's exam!: Q. Given, quadratic equation is : - 4 x 2 - 3 x - 5 = 0

Which constant should be added or subtracted to solve the quadratic equation 4x^2 - 3x -5 by method of completing the square?
Answer by expert shows( root 3/8)2. But how? I dint understand? Please explain. Tomorrow's exam!:

Q. Given, quadratic equation is :

- $4 x^{2} - \sqrt{3 x} - 5 = 0$