Iwant to know what

3 + 4x = -13 - 4x

Solution: x= -2

to solve for x:

3+4x=-13-4x

move variable to the left side and change its sign.

move constant to the right side and change its sign.

collect like terms

calculate the difference

divide both sids by 8

solution: x=-2

The constant of variation for the given quadratic equation is, 30

Step-by-step explanation:

One of the form of a quadratic equation is written as:

    ....[1]

where k is the coefficient and for this case the constant of variation.

In order to obtain the answer for the given equation, we write the given equation to the form above.

 or

or

Comparing this equation with equation [1], to get the value of k;

k=30.

therefore, the  constant of variation is, 30.