Question

Alessandro wrote the quadratic equation -6=x2+4x-1 in standard form. What is the value of c in his new equation?

c=-6
c=-1
c=5
c=7

Answer 1

the answer is c

Explanation:

Answer 2

Given:

A quadratic equation is

`-6=x^2+4x-1`

To find:

The standard form of the given equation and find the value of c.

Solution:

The standard form of a quadratic equation is

`ax^2+bx+c=0` ...(i)

We have,

`-6=x^2+4x-1`

It can be rewritten as

`0=x^2+4x-1+6`

`0=x^2+4x+5`

`x^2+4x+5=0` ...(ii)

On comparing (i) and (ii), we get

`c=5`

Therefore, the value of c is equal to 5 and the correct option is C.